Our team of certified personal trainers, strength coaches, and qualified experts researched and tested more than 30 workout apps. We focused on key factors such as workout variety, accountability, and interactive features.
Learn more
Trusted experts:
We called upon certified personal trainer and editor Amanda Dvorak, exercise physiologist Dr. Chris Mohr, and professor and strength and conditioning coach Dr. Jen Roper to complete this roundup. The information in this article was reviewed for accuracy by fact checker Kelly Uhler.
If you’re committed to crushing your fitness goals, there’s nothing wrong with seeking some support. However, you don’t have to break the bank to get help with building muscle, burning fat, and becoming your best self. While many workout apps have pricey subscriptions, plenty of cost-free platforms provide the tools you need to start (and stay) on the path to success.
To help you find the right fit, we’ve researched and tested more than 30 fitness apps to evaluate key criteria such as ease of use, equipment demands, and workout variety. Our mission to find the best free workout apps helped us identify worthy contenders. The apps that made our list come at no cost or at least include an excellent trial period that may convince you to find some room in your monthly budget.
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Best free workout app overall
Caliber
offers a free-forever version that arms you with ample resources to start your fitness journey. Learn why it earned the nod as our best overall free workout app by reading our in-depth review, complete with testing notes.
Our picks for the best free workout apps
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Caliber
Sweat App
Fiit
Train Fitness
Nike Training Club
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Aaptiv
Jefit
FitOn
SmartWOD
Rating
Price
Free version, or $12-$200 per month
$20 per month or $120 per year
Free version, $8 or $20 per month
Free
Free
$15 per month or $100 per year
Free version, $13 per month, or $70 per year for Jefit Elite
Free version or $30 per year
Free version, or $1.99 per month, $12.49 per year, or $40 for lifetime access
Free Trial
Free-forever version
Seven days
Free-forever version or 14 days for paid plans
N/A
N/A
Seven days
Seven days
Free-forever version
Free-forever version
Platform
iOS, Android
iOS, Android
iOS, Android
iOS
iOS, Android
iOS, Android
iOS, Android, Desktop
iOS, Android
iOS, Android
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Best free workout app overall:
Caliber
Best free workout app overall
Although you must pay for group and one-on-one training, the free version of Caliber still provides excellent resources and tools.
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Key product features
Instruction
Excellent
Compatible
Apple Watch
Exercises
500+
Community
Groups
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What you should know
Caliber comes in several different tiers, which allows you to select the level of support you need. The free version includes useful resources that can help you accomplish your goals.
Our product tester gave Caliber a perfect score for instruction, noting that each exercise has an extensive overview of the movement.
The fully free version of Caliber gives you access to a deep library of exercises and workouts that you can utilize to make gains.
This highly-rated workout app can serve as a solid starting point while allowing you to upgrade if you want to work directly with a coach.
Pros
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Community support via groups
In-app performance metrics tracking
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Robust library of curated workout plans
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Cons
Premium package has an expensive starting price of $200 a month, which is high for a workout app
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Personalized macros only available with paid versions
Limited fitness tracker integration
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Why we like Caliber as best overall
As a fitness coaching program rooted in scientific principles, Caliber checks all the boxes we look for in the
best workout apps
. The first paid tier, Caliber Plus, comes with access to a library of coach-created workouts. The next tier, Caliber Premium, starts at $200 a month for individual coaching. One of our product testers invested in the one-on-one option and found the $200 price tag well worth it due to the high-quality programming and accountability she received from her coach.
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However, you don’t have to spend a single cent to reap some of the benefits of this data-driven platform. Caliber’s free-forever version contains a vast library of more than 500 exercises, each featuring a demo video, detailed instructions, and a color-coded diagram displaying the body parts involved. By also including key points and form takeaways, Caliber easily earned 5 out of 5 stars for instruction from our tester.
“So many people would benefit from simple instruction and understanding of how different exercises affect different muscles. The exercise library and demo videos provided with Caliber’s free version is a fantastic offering, in and of itself. Many of my clients would benefit from this.”
Chris Mohr, Ph.D., RD, Fortune Recommends Advisor
Although you don’t get access to a coach with the free version, you don’t have to plan your own daily workouts. During the set-up process, you’ll complete a quick assessment. The evaluation will give the Caliber algorithm the necessary data to generate a custom workout program for you. This can be especially helpful for beginners who are unfamiliar with how to structure a strength training routine.
In addition, the app allows you to track your progress by recording and charting strength and body metrics like your weight, waist size, and body fat percentage. While stepping on a scale is one way to assess your progress, keeping track of your body composition via other methods can provide better insight. (
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1
) This can help you stay invested in your success by developing self-accountability, which is particularly important since you won’t be working with a coach.
“In addition to body composition, waist circumference is another useful and very simple tool to assess health. There has been research connecting waist circumference to blood pressure and even all cause mortality, among others,” says Mohr. (
2
,
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3
)
You can also lean on another user-friendly feature for additional support: groups. Our product tester joined several, including ones for mountain biking, cycling, and swimming. Research shows that external factors like social support and engagement can help with motivation and accountability. (
4
)
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“Each group has its own social feed where you can post things and interact with other people. Although there’s not a ton of engagement, that could change as Caliber expands,” our team product tester explained.
While our tester gave the app a perfect score for interactive features, she wished it integrated with Garmin, Fitbit, and other fitness trackers. As of this writing, it only integrates with the Apple Watch.
Overall, the free version of Caliber offers plenty of valuable tools and resources for both beginners and more experienced users. If you need more support in the form of nutritional guidance, routine check-ins, and fully personalized programming, you can always upgrade to the Premium tier.
What Customers are saying
Caliber users on the Apple App Store appreciate how the app has helped them become more accountable and invested in their health and wellness.
“Caliber is a fantastic way to build a habit of working out, especially if, like me, you’re moderately new to weight lifting/fat burning. The app tracks your progress and shows stats so you can see improvement over time, which is very motivational for me. The app also connects to third-party apps to help you track calories, etc.”
Alexey Laduda, Apple App Store user
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However, customer Patrick Rizk called out a few areas for improvement in his review on the Google Play Store.
“Provides novel strength and balance scores to visualize progress, but the algorithm doesn’t incorporate them to give tailored recommendations, which greatly reduces their utility,” he said. “Automatic weight progression is a basic function that most competitor apps have and is conspicuously missing.”
Specs
Price
Fully free version, $12 a month for Plus, or $200 a month and up for Premium
Platform
iOS, Android
Type of training
Cardio, strength, functional fitness
Best free workout app for women:
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Sweat App
Best free workout app for women
Launched by fitness influencer Kayla Itsines, the Sweat App offers women everything from nutritional guidance to on-demand classes.
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Key product features
Reminders
Real-Time
Nutrition
Meal Planning
Programs
50+
Training Plan
Customizable
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What you should know
Designed for women, the Sweat App includes customizable training plans and meal planning assistance. After trying out the platform for free for seven days, you can sign up for the full version to gain even more features.
The Sweat App excels at offering a wide variety of programs, with classes ranging from high-intensity training to daily yoga sessions.
While users can try the Sweat App for free for seven days, the annual subscription cost of $119.94 still represents great value given the wealth of resources you receive.
Women seeking a female-focused fitness app should enjoy Sweat’s community feel and solid programming.
Pros
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Can easily modify a program
Cons
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Some users describe the programs as repetitive
Primarily pre-recorded workouts
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Some recipes are overly complicated and require numerous ingredients
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Why we like Sweat App as best for women
Fitness influencer Kayla Itsines spearheaded an effort to help women get healthier via the Sweat App. The app features various workout programs that include everything from postpartum training to its flagship BBG program (Bikini Body Guide), now known as “High Intensity with Kayla.” The app also features nutrition plans, community challenges, and on-demand classes led by certified personal trainers.
Although Sweat is only free during the seven-day trial period, women can get a first-hand look at how much the platform offers. Those with long-term goals can decide whether to invest in a monthly subscription that’ll allow them to receive individualized attention and support.
To explore all Sweat had to offer, our product tester downloaded the app, inputted her fitness goals and other pertinent information, and received a personalized training plan. She rated the setup process 5 out of 5 stars. She also found the app’s interface easy to navigate, which led to a score of 4.5 out of 5 stars for ease of use.
From a training perspective, Sweat covers just about every modality you can think of, including weightlifting, HIIT, yoga, pilates, and barre. In addition, there are zero-equipment versions of programs featuring straightforward movements, which allowed our reviewer to “deeply connect with the targeted muscle.”
What our tester says:
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“Offering the ability to exercise without equipment is a fantastic option, given many people may either not have any or not belong to a facility that does. That said, bodyweight workouts are a great option for improving strength and cardiorespiratory fitness, and having guidance around how to perform various exercises to support your goals is great.” (
5
)
Chris Mohr, Ph.D., RD, Fortune Recommends Advisor
What customers are saying
The Sweat App has received positive feedback from women who needed structure, accountability, and support from a workout app.
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A reviewer on the Apple App Store with the username Hxnxlei highlighted how the app motivated her to start working out again after a two-year hiatus.
“The variety in programs makes it suitable for any kind of workout goal. I can see how the intensity and difficulty of BBG might be unmotivating for some though, so it’s great that Kayla has recently added more beginner weeks! The community tab is filled with supportive women!”
Hxnxlei, Apple App Store user
Still, a few reviews criticized the app for having occasional bugs and glitches. Several customers on both the Apple App Store and the Google Play Store expressed that the suggested meal plans and recipes contained too many ingredients, which can prove problematic if you have a limited budget, time, or culinary skills.
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Specs
Price
Free seven-day trial; $120 for an annual subscription; $20 for a monthly subscription
From strength training to recovery, Fiit offers plenty of options for those who enjoy group classes but don’t want to travel.
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Key product features
Workouts
2,000+
Tracking
30+ devices
Training Plans
More than 30
Group classes
Daily
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What you should know
Fiit covers all the bases with a wide variety of workouts and training plans. Users can access all group classes at no cost—a great feature for those who enjoy training in that type of engaging setting.
Fiit offers a huge library of classes that include bodyweight workouts, HIIT, strength training, functional movement, and more.
Signing up for one of the paid tiers provides access to a 14-day free trial, giving you sufficient time to test all of Fiit’s features.
If you like group classes, this interactive platform can be a more convenient solution than commuting to a commercial gym.
Pros
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Syncs with fitness trackers and devices
Works with mobile devices, TVs, laptops, tablets, and desktops
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Records performance metrics
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Caters to all fitness levels
Cons
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Some classes may be too intense for beginners
No 1:1 coaching or accountability
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Can’t fast forward or rewind classes
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Why we like Fiit as best for men
Men (and women) who love the interactive aspect of group fitness classes will truly appreciate Fiit. Available in both free and paid versions, this app offers 2,000 workouts ranging from strength training to cardio to yoga.
The free version gives you unlimited access to all group classes—a major plus for those who value that added motivation from training alongside others (virtually, in this case). Plus, you can invite family and friends to join, which can be another source of accountability and self-motivation. (
6
)
The workouts vary in length, with some taking as little as 10 minutes and others lasting for one hour. If you’re a guy who’s always on the go, you can still squeeze in a quick workout before you head out the door. Or, you can take a longer-duration session for a true full-body workout.
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Another user-friendly feature Fiit offers: the ability to complete workouts with zero gym equipment. The platform has hundreds of bodyweight classes that only require a phone, TV, or laptop for streaming.
While the free version gives you plenty to work with, upgrading to the Essential or Unlimited tiers opens the door to more training possibilities. Luckily, you don’t have to fully commit to either option. Fiit offers a 14-day free trial that allows you to test additional features like Apple and Google Health integration, performance metrics tracking, and exclusive workouts.
Ultimately, you can start with the free version and enjoy unlimited access to all of Fiit’s group classes before considering upgrading to the Essential ($80 per year) or Unlimited ($120 per year) tiers.
What Customers are saying
Fiit customers enjoy the quality of the workouts and that they’re challenging without being too time-consuming.
“This app is fantastic! I’ve been completing FIIT workouts for about 3 months now, and it has completely changed my view on working out! The Base FIIT camps are great for an out of shape beginner like myself, and they prepare you for heavier workouts through lots of technique and form practice, and stretching. The ‘flow’ yoga classes too, are also super useful as a supplemental cooldown/stretch session.”
Aurora Siegler, Android app user
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However, one common pain point customers highlight is the inability to fast forward or rewind classes.
“This is really important as sometimes you don’t quite understand how to do a move and want to rewind to see it properly,” wrote Android user Hussein Ladha.
Specs
Price
Free-forever version; $8-$20 a month; or $80-$120 a year
Designed for Apple Watch users, Train Fitness allows you to automatically track and log over 100 exercises using AI technology.
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Key product features
Rep Counting
Automatic
Tracking
100+ exercises
Accountability
Community feed
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What you should know
Think of Train Fitness as a tool to get more insight into your workouts rather than something that will guide you on how to train. It’s a convenient way to log every rep without having to do it yourself.
Unlike other fitness apps, Train Fitness doesn’t provide workouts or training programs.
This completely free app features an AI detection system that allows you to track your workouts hands-free.
Apple Watch users can take full advantage of their device by utilizing Train Fitness to track their reps during a workout.
Pros
Sturdy and high-quality mattress
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Nice option for stomach sleepers
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Good option for back sleepers
I also like this for heavier sleepers
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Cons
Pretty high motion transfer
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Luxury Firm is too firm for side sleepers
Customer service was longer than average
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Why we like Train Fitness as best gym
Gym-goers whose workout routine wouldn’t be complete without their Apple Watch shouldn’t hesitate to download Train Fitness. Powered by intuitive AI, this app doesn’t provide programs or workouts to follow. Rather, it allows users to focus more on their technique and less on counting their reps by recording them for you.
When paired with the Apple Watch, AI algorithms automatically detect what exercise you are performing based on the movement of your wrist. Train Fitness tracks more than 100 exercises using this method, and you can also manually enter data for more than 400 exercises.
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In addition, you can filter and review their workout data by multiple metrics. The interface has easy-to-read graphics and charts that show your progress with particular lifts. This may help you identify weak points and potentially inspire you to change your program to push through plateaus.
Moreover, Train Fitness encourages you to stay connected with other users by sharing your completed workouts on your social feed. You can also challenge a friend, which can give both of you extra motivation to not to skip out on your next gym session.
Unfortunately, this app doesn’t give you training plans to implement in the gym. So, if you’re searching for a structured routine, Train Fitness isn’t for you. However, if you have an Apple Watch and a gym membership (or even a
full home gym
), you can take advantage of this technology and get more insight into your workouts without having to do anything extra.
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What Customers are saying
Featuring a rebuilt search function and notifications page, this AI-driven workout tracking app generates positive user feedback for being easy to use and accurate.
“I have been amazed at the accurate ability of the application to recognize specific workouts while I am at the gym,” a user named Gym Geno wrote in their review on the Apple App Store. “I highly recommend using this app because not only can experienced gym enthusiasts maximize their workout sessions, but this platform can also teach newcomers as well.”
Another reviewer on the Apple App Store with the username KaseyLynn R. shared a similar sentiment about Train Fitness.
“I absolutely love this app! It makes my workouts so easy. I used to log with a pen and paper but that got hard and annoying. This app also helps me know what muscles need rest and what muscles need attention.”
KaseyLynn R., Apple App Store user
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Specs
Price
Free
Platform
iOS
Type of training
Workout tracking
Best free dumbbell workout app
A free app that includes classes and periodized programs, Nike Training Club can help you get more out of your dumbbell workouts.
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Key product features
Classes
Live/on-deman
Workout types
More than 10
Programming
Periodized
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What you should know
Nike Training Club is a completely free workout app that offers periodized programming and engaging classes. You can put your
favorite dumbbells
to work with strength training workouts, or find bodyweight options if you don’t have equipment available.
There’s no shortage of variety when it comes to workouts, as this app covers multiple modalities ranging from strength training to HIIT to pilates.
Our product tester gave Nike Training Club a perfect value score—a testament to the number of resources you receive for zero cost.
As a free app, NTC should appeal to any health-conscious person who wants to upgrade their workout routine without spending any extra money.
Pros
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Wide range of workout types
Most workouts taught by certified trainers and instructors
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Cons
Doesn’t track workout metrics
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May not offer enough variety for advanced-level users
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Why we like Nike Training Club as best dumbbell
A free exercise app that features a clean interface and a large library of individual workouts and on-demand classes, Nike Training Club (NTC) caters to users of all fitness levels. Whether you’re training in your garage or at a commercial gym, you can utilize this highly-rated platform to put your
adjustable dumbbells
, kettlebells, or other equipment to good use. Dumbbell training, in particular,
NTC offers periodized programming for a wide range of goals and workout types, which means you can work on developing strength and endurance as you hone your technique.
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“You just don’t see this kind of value in a free workout app.”
Team product tester
Earning perfect scores from our reviewers for setup and ease of use, NTC makes it simple to find workouts by muscle group, equipment, or workout focus (endurance, mobility, strength, or yoga). Trainers on the app also have profiles that display their expertise, along with introduction videos.
In addition, NTC offers “whiteboard” classes that are non-trainer-led. If you need guidance and structure but don’t want or need to follow an instructor, you can try these workouts instead.
However, Nike Training Club doesn’t provide much accountability.
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“You can download the app on your phone, but no one is going to push you to use it,” our reviewer noted. “It does send notifications if you enable them, and you can join specific programs or challenges.”
Although the app lacks interactive features like coach interaction and stat tracking, it still provides an excellent user experience. Whether you’re focused on making maximum gains or getting in shape for an upcoming event, there are ample options for workout programs and classes that can show you how to use dumbbells (and other equipment) effectively.
What Customers are saying
Customers consistently praise Nike Training Club’s easy-to-navigate interface, along with the ability to select workouts that align with their goals, available equipment, and experience level.
“I’ve been pregnant for nearly two years now (back-to-back kids…) and love how A. The app is free. Period. And B. The ladies coaching the prenatal/postnatal programs seem awesome to work with. I love how I don’t have to pay a cent to access the workout videos and the resources, and no ads either. The interface is seamless and easy to navigate. Nike does a great job recruiting other real moms and moms-to-be to show alternative poses/positions, and the coaches themselves are mothers, too.”
luu1uu, Apple App Store user
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A few negative reviews pointed out glitches with the app.
“No option past the log-in button; just sits there with the background animation,” a user named Sierra Eaves wrote in her review on the Google Play Store.
Aaptiv features audio-guided workouts from certified coaches and trainers, providing ample variety to keep you engaged.
Key product features
Workouts
More than 9,500
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Equipment
None needed
Accountability
Community feed
Instruction
Audio guidance
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What you should know
Aaptiv’s audio-guided workouts should give you a boost of confidence and comfort when it’s time to train. With nearly 10,000 workouts to choose from, you can challenge yourself to try something new every time you log on.
Our product tester noted that the well-designed workouts were obviously programmed by skilled, experienced coaches.
Although Aaptiv costs $15 per month, you can try it for free for seven days.
This app may benefit beginners looking for a budget-friendly workout app that doesn’t require additional equipment to get started.
Pros
No limits to the types of workouts offered
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Excellent audio instructions
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Supportive online community
Cons
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Fewer coaches than competitor apps
Must sign up for annual plan to get seven-day free trial
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Why we like Aaptiv as best for bodyweight
As a certified personal trainer, I can admit that some bodyweight workouts are more challenging than ones with even
the best kettlebells
, dumbbells, and barbells. Whether it’s burpees, push-ups, or mountain climbers, you may be surprised at how taxing a no-equipment session can be. Aaptiv might be the ideal fit if you’re looking for a workout app that suits this style of training.
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Although it’s only free for a seven-day trial, this platform is one of the most affordable on the market. Available for $15 per month or at a discounted rate of $100 for an annual subscription, Aaptiv gives you access to almost 10,000 workouts ranging from strength training to pilates to outdoor running. Our product tester had no trouble navigating the app, rating it 5 out of 5 stars for ease of use.
“You can filter workouts by type, length, muscle group, fitness level, and even equipment. You can also easily change your information, such as your weight, at any time.”
Team product tester
What separates this app from others is that the workouts include audio guidance from certified trainers and coaches. If you’re unfamiliar with certain movements, this can be particularly helpful.
Our product tester, who’s also a certified personal trainer, called attention to Aaptiv’s coaches for providing top-notch programming with a session that focused on contralateral training (strengthening one side of the body). “This is something only a high-level trainer would likely program,” she explained.
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Although Aaptiv earned 4 out of 5 stars for instruction, our product tester highlighted that there’s not always an instructor on the screen.
“Some of the workouts it’s more like having an animation of a person doing the movements with the trainer speaking in the background,” she noted. “This certainly could throw some people off.”
What Customers are saying
Aaptiv users appreciate being able to choose from so many training styles.
“This app has been so helpful. The wide variety of content makes it a one-stop shop for me. In the last six months, I’ve discovered yoga and really appreciate the variety of coaches and yoga types available.”
Otis Oxnard, Apple App Store user
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Meanwhile, another user highlighted how Aaptiv has helped him remain engaged and focused even without an in-person trainer.
“The coaches may just be recorded, but psychologically it feels like you aren’t alone and that someone is with you and cheering for you. That makes all the difference for motivation and endurance,” wrote iOS user gpottschicago.
However, several negative reviews mention glitches and technical errors with the app.
“My biggest complaint is that every single time there’s an update to the app, it messes the sync with my Apple Watch and I have to start workouts manually for a while if I want them to be recorded at all,” wrote iOS user EME314.
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Specs
Price
Seven-day free trial; $15 per month or $100 for yearly subscription
The free version of Jefit allows you to log and track your workouts while also giving you access to a huge exercise library.
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Key product features
Exercises
More than 1,400
Workout plans
Pro-designed
Tiers
Free and paid
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What you should know
Jefit features an extensive exercise library that’s broken down by body part. Even though you won’t work with a coach, you can utilize reminders and notifications to stay on track with your fitness plan.
Our product tester gave Jefit a rating of 4 out of 5 stars for accountability, noting that you turn on push notifications and set workout reminders for any time. You can also set reminders if you’re inactive for two weeks.
Jefit is available in either a free version or Jefit Elite, which costs $13 per month or $70 per year. Compared to other workout apps, this is a highly affordable price point.
This app should appeal to users who want variety and guidance for their workouts at no cost.
Pros
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Workouts designed by professional coaches
Why we like Jefit as best for abs
With both an extensive free version and an Elite membership option, Jefit caters to gym enthusiasts looking to level up their workouts. The no-cost version lets you log and track your workouts—a feature that can assist with accountability. If you’re trying to build muscle or defined abdominals, maintaining a consistent approach is key to accomplishing your goal.
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Keep in mind, though, that routinely performing core exercises doesn’t guarantee you’ll get a shredded stomach. Other factors, such as your diet and genetics, play critical roles in your ability to get defined abs.
In addition to tracking, Jefit’s free version also gives you access to some workout routines. More importantly, you can browse through an exercise library that left our product tester and Olympic weightlifter highly impressed.
“I love how the Nolah Evolution comes in three different firmness models, so you can choose the best fit for you. One of my favorite features is the soft pillow top. It’s a great touch for anyone that suffers from shoulder or hip pain, as it allows you to sink into bed for a plusher feel.”
Bridget Chapman, former senior product editor
For ab-focused sessions, there’s more than enough variety to keep you engaged without getting bored. From alternating leg bridges to barbell press sit-ups to cable oblique crunches, Jefit’s database contains 25 pages of core exercises, each with video demos and step-by-step instructions.
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Overall, our lead product tester rated the app 4 out of 5 stars for instruction.
“The biggest benefit is that there is a person doing the movement on the screen as you do it,” she noted.
However, keep in mind that some of the app’s functionality is limited in the free version. For example, you must upgrade to Jefit Elite to receive exercise cues and “audio tip” workouts. In addition, many of the pro-designed workout plans require a subscription, which costs either $13 per month or $70 per year.
Still, you can utilize Jefit’s exercise library and free gym workouts to get more out of your training or add variety to your routine. While you may not get personalized programming for free, you can count on giving your abs a challenge with the free 3-Day Core Superset Routine, which our tester completed (and enjoyed).
“If you just want some variety and guidance for workouts from an app that will track your progress, this is a decent option!” she reported.
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What Customers are saying
Jefit has earned high praise from users for providing an excellent exercise library, along with different workout programs that are both challenging and enjoyable.
“I’ve been using it for several years. The app does an excellent job in tracking my progress and is very customizable. I love the feature that allows me to customize my own exercises and routines and write my own instruction reminders. My only knock on the app is also a positive as well and that is this—the App is updated regularly.”
Priest Man, Apple App Store user
One negative review pointed out that Jefit can be unreliable.
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“The reason I have to try other apps for now is the flakiness of the app’s syncing. It used to take up to half a minute for the watch app to sync with the phone app and store a workout. It was annoying and time-consuming to babysit it, but at least it worked. Lately, however, it will not work at all,” wrote an iOS user named Jon Vuri.
Specs
Price
Free version, or $13 per month or $70 per year for Jefit Elite
Platform
Desktop, Android, and iOS
Type of training
Strength training, bodyweight, HIIT
Best free workout app for beginners:
FitOn
Best free app for beginners
With trainer-led videos and shorter workout programs, FitOn is well-suited for people who are just starting their fitness journey.
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Key product features
Apple Watch
Compatible
Classes
Live/on-demand
Mindfulness
Meditation/yoga
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Members
15+ million
Nutrition
500+ recipes
What you should know
FitOn is a fully free workout app that also encompasses nutrition and mental health. This well-rounded platform is available in a Pro version.
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Our product tester had no trouble navigating FitOn’s intuitive interface and gave the app 5 out of 5 stars for ease of use.
Although all workouts and personalized fitness plans are 100% free, you will have to upgrade to FitOn Pro if you want extra features like premium music and unlimited offline downloads.
FitOn is a great option if you’re at the beginning of your journey, as you can try different types of workouts and find the training style that works best for you—at no cost.
Pros
Free version gives full access to all workouts
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Comprehensive health and fitness app
Cons
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Many features require paid version
No monthly subscription option
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Why we like FitOn as best for beginners
Available in both a free-forever and Pro version, FitOn is a fantastic way for inexperienced folks to get started with their fitness journey. This comprehensive health and fitness app gives users full access to all workouts at no cost—a huge benefit for those who may not know where to begin.
Once you download the app, the setup process is a breeze. Our product tester gave FitOn a perfect score in this category, noting that you will have to answer questions about your height, weight, what type of workouts you’re interested in, and your experience level.
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For beginners who are unfamiliar with navigating fitness apps, FitOn features an intuitive, user-friendly interface. As a result, our reviewer gave the app 5 out of 5 stars for ease of use.
“There’s an icon for all the features, such as workouts, advice, meals, and friends. The app is not overwhelming; it’s easy to find what you want.”
Team product tester
Most importantly, new trainees can feel confident about doing the workouts correctly. Our reviewer still gave FitOn 4 out of 5 stars for instruction.
“There’s an on-screen trainer in the workouts who is very motivating,” she noted. “They show you how to do the exercise, and most of the workouts show modifications for the movements.”
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Although FitOn only earned 3 out of 5 stars for interactive features, it stood out in two other areas: workout variety and value.
“I would never get bored using this app since there are so many options,” our reviewer wrote.
What Customers are saying
FitOn users praise this platform for providing ample training options and high-level instruction.
“Amazing workout programs with great flexibility and variety ranging from cardio/HIIT to resistance and strength training. You have a TON of trainers to choose from, have the ability to add to favorites, and the length of workouts and intensity levels also vary depending on how you are feeling! This app has single-handedly helped me get back on track with my fitness.”
BAPwarrior0126, Apple App Store user
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Several negative reviews call out FItOn for no longer allowing screen sharing.
“I just want to be able to SEE the workouts without squinting at a small screen and/or getting out of positions to peer over at the next move,” wrote an iOS user with the screen name connoodle.
Specs
Price
Free version; $25 for six months or $30 a year for Pro
Functional fitness enthusiasts will appreciate SmartWOD, which features tools for timing and generating high-intensity workouts.
Key product features
Timers
Multiple
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WODs
More than 5,000
Customizable
Yes
What you should know
SmartWOD is geared toward CrossFitters and those who enjoy HIIT-style workouts. With timing and workout generator tools, this app can help make your sessions more effective and dynamic.
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Our product tester gave this app a perfect score for workout variety.
While the SmartWOD timer is completely free, you will have to pay a subscription cost to use the WOD generator.
SmartWOD should appeal to functional fitness and CrossFit enthusiasts who want to switch up their routines and take advantage of tracking and timing tools.
Pros
Customized to available equipment
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Generator component can be fun to use
Workout log for tracking progress
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Cons
Lots of ads on SmartWOD timer
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Filtering options could be better
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Why we like SmartWOD as best for CrossFit
CrossFitters and those who enjoy intense, dynamic workouts can turn to SmartWOD for support. This app includes a free timer feature that can be utilized for all types of functional fitness training. For example, you can use it for AMRAP (as many rounds as possible), EMOMs (every minute on the minute), Tabata (intervals of work and rest), or For Time workouts. The AMRAP and For Time timers also have round counters to help you keep track of where you are in your workout.
Upgrading to the paid version will also allow you to use the SmartWOD generator tool for creating customized workouts.
Our product tester highlighted how simple it was to get started and gave it 5 out of 5 stars for setup and ease of use. “You just select what equipment you have access to and then keep pressing the spinner button until you come across a workout you like,” she noted. If you have limited access to equipment due to traveling, this can allow you to still train.
You can also filter by skill, so if you aren’t comfortable with performing a certain movement, the app won’t show particular exercises.
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“You could select a pull-up bar for equipment but also deselect muscle-ups for skills and it won’t give you any workouts that feature muscle-ups,” our tester explained.
Since some common CrossFit moves like snatches and cleans can be particularly challenging and require precise technique, it’s important to see them performed correctly. Luckily, SmartWOD earned a solid score of 4 out of 5 stars for instruction, as each exercise features a demo video.
“They’re nicely filmed and there’s also a detailed ‘movement’ page for each exercise, complete with step-by-step instructions and cues,” our reviewer noted. “It’s honestly great content.”
On the other hand, our product tester gave SmartWOD a disappointing score of just 1 out of 5 stars for both interactive features and accountability.
What Customers are saying
SmartWOD customers appreciate the ability to customize workouts based on their skill level and available equipment.
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“Perfect for any workout, easy to set up and change depending on needs. My go-to workout app.”
Darsheezy27, Apple App Store user
Another user pointed out an inconvenience when trying to use SmartWOD and another app at the same time.
“This is a great app and I’m glad to have it. But dang if they don’t make it hard to put the timer up on the screen AND have a second app open,” wrote iOS user jlharter. “I keep my WODs in Notes while screen sharing to my gym TV. And while I can have the note open in slide-over, it covers part of the timer.”
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Specs
Price
Free version, or $1.99 per month, $12.49 per year, or $40 for lifetime access
Platform
Android and iOS
Type of training
Functional fitness
How we test workout apps
Our team has collectively researched and tested more than 30 workout apps to evaluate which provide the best overall user experience. We assign scores ranging from 1 to 5 stars across key categories, taking into account that some areas matter more than others. Although not every category applies across the board, our experienced product testers have carefully analyzed each app to assess their respective strengths and weaknesses. You can read our full
fitness program testing methodology here
.
Here’s a breakdown of what factors go into our scoring process:
Program design—30%
With decades of collective experience, our testers can discern the difference between a one-size-fits-all program and one that’s put together by a certified personal trainer, strength and conditioning coach, or another qualified expert. We evaluate whether a program includes step-by-step descriptions and video tutorials so you can understand how to perform each exercise.
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In addition, for free platforms that offer training plans, we assess the volume and overall structure to see if the average user should be able to follow.
Here’s what we’re looking for from a program design standpoint:
Explanation
Versatility
Reasonable amount of training volume
Value—30%
Fully free fitness apps deliver value simply by giving users tools and resources at no cost. However, the best ones step up with a level of personalization that makes you feel even more invested in your success. Our testing team also looks for what type of technology the app uses, as some platforms utilize AI to generate training programs.
Overall, here’s what we factor into a program’s value rating:
Fair price
Personalization
Technology
Extra options—20%
While some free workout apps offer basic functionality, others go a step further. Does the platform provide more than just a handful of programs? Are you able to work with a certified coach? Is there a social media group or community feed where you can interact with other users?
All of these options can make a difference:
Additional programs
Coaching
Tech extras
Customer experience—20%
Users want to focus on working out and getting results—not dealing with glitches and crashes. We value workout apps that provide a positive overall experience with features like free trials, glitchless platforms, and excellent customer support.
Here are the factors we take into account:
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Reliable and user-friendly apps
Reviews
Customer service
Free trials and flexible cancellation policies
What to look for in the best free workout apps
Here are some important factors to keep in mind when you’re considering which free workout app to download on your iPhone or Android device:
Style of training
Find an app that offers the type of training you enjoy most. Some platforms specialize in certain modalities, while others offer a broad spectrum of classes and workouts. For example, if you’re looking for a free workout app that focuses on functional fitness, SmartWOD would fit the bill. On the other hand, strength training enthusiasts may prefer something like Caliber.
Classes vs. programs
Are you interested in participating in virtual fitness classes where you can interact with others? Or do you want a program that includes structured workouts? Some platforms offer both, which can be appealing to people who enjoy both group and solo sessions.
Tracking tools
Does the app provide tracking tools for free? Whether it’s monitoring your strength progress or keeping tabs on your body measurements, having some method to maintain accountability will help you achieve your goals.
FAQs
Are there any truly free workout apps?
Yes, several workout apps cost nothing to use, including Nike Training Club and the fully free versions of Caliber, SmartWOD, and FitOn.
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What is the best free online workout program?
We consider Caliber to be the best free online workout program, as it provides a vast exercise library, tracking tools, and other helpful resources.
Is FitOn really free?
There is a completely free version of FitOn that gives you unlimited access to a database of workouts. Meanwhile, the Pro version provides additional features like personalized meal plans, an exclusive recipe library, and unlimited offline downloads of workouts for a subscription fee.
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Our experts
Amanda Dvorak, CPT
Amanda Dvorak is a Fortune Recommends writer and editor. A garage gym owner who is passionate about working out and healthy living, she has four years of experience writing product reviews for fitness and nutrition websites. Amanda is a certified personal trainer through the International Sports Sciences Association (ISSA).
Christopher Mohr, Ph.D., RD
Dr. Christopher Mohr is an internationally recognized subject matter expert and speaker and performance coach. Through his facilitation and online resources, he works closely with some of the largest corporations in the world including Deloitte, Delta Airlines, Johnson & Johnson and more to help busy executives all over the world, develop the energy to thrive personally and professionally.
Jen Roper, Ph.D., CSCS
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Dr. Jen Roper is an associate professor of Health and Human Sciences at Loyola Marymount University. She received her Ph.D. in Physical Education, Sports and Exercise Science in 2015 from the University of New Mexico, with a specialization in Exercise Science and Biomechanics. She has been a Certified Strength and Conditioning Specialist from the National Strength and Conditioning Association since 2014.
Jessica Coulon
Jessica is a contributing editor and writer for Fortune Recommends who specializes in fitness, health, nutrition, and science content. Previously, she was an editor for Popular Mechanics and Bicycling, where she covered pro cycling news, wrote how-to guides, and tested all the latest and greatest bike gear. She was also a regular shoe tester and contributor for Runner’s World. You can often find her skiing or riding her mountain bike, and racing with the F1RE female enduro team.
Kelly Uhler
Kelly has a multifaceted background in elder care, health care, and copywriting. She has worked for organizations such as A Place For Mom and Homecare.com, which gave her the opportunity to work closely with families, providing reliable information to help them make informed decisions about their loved one’s health, safety, and quality of life.
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References
Holmes, C. J., & Racette, S. B. (2021). The Utility of Body Composition Assessment in Nutrition and Clinical Practice: An Overview of Current Methodology.
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https://doi.org/10.3390/nu13082493
Sun Jin-Yu, Hua Yang, Zou Hua-Yi-Yang, Qu Qiang, Yuan Yue, Sun Guo-Zhen, Sun Wei, Kong Xiang-Qing. Association Between Waist Circumference and the Prevalence of (Pre) Hypertension Among 27,894 US Adults.
Jacobs EJ, Newton CC, Wang Y, et al. Waist Circumference and All-Cause Mortality in a Large US Cohort. Arch Intern Med. 2010;170(15):1293–1301.
https://do.org/10.1001/archinternmed.2010.201
Deslippe AL, Soanes A, Bouchaud CC, Beckenstein H, Slim M, Plourde H, Cohen TR. Barriers and facilitators to diet, physical activity and lifestyle behavior intervention adherence: a qualitative systematic review of the literature. Int J Behav Nutr Phys Act. 2023 Feb 14;20(1):14.
https://doi.org/10.1186/s12966-023-01424-2
. PMID: 36782207; PMCID: PMC9925368.
Archila LR, Bostad W, Joyner MJ, Gibala MJ. Simple Bodyweight Training Improves Cardiorespiratory Fitness with Minimal Time Commitment: A Contemporary Application of the 5BX Approach. Int J Exerc Sci. 2021 Apr 1;14(3):93-100. PMID: 34055156; PMCID: PMC8136567.
Graupensperger, S., Gottschall, J. S., Benson, A. J., Eys, M., Hastings, B., & Evans, M. B. (2019). Perceptions of groupness during fitness classes positively predict recalled perceptions of exertion, enjoyment, and affective valence: An intensive longitudinal investigation.
If you’ve ever started a new workout routine with the best intentions only to find yourself skipping sessions by week two, you’re not alone. I’m the type to get trapped in the same cycle of burnout, where I go hard for a couple of weeks, feel exhausted, feel guilty, and repeat. For me, what finally broke that cycle wasn’t a new gym membership or a fancy fitness app, but a simple scheduling hack: the “3-3-3 rule.” I’d seen this rule applied it to general productivity, and all the same principles can apply to your fitness habits, too. Here’s how you can use the 3-3-3 rules to structure your workouts and create a habit that sticks.
What is the 3-3-3 rule?
The 3-3-3 “rule” (or “method,” or “gentle suggestion”) is essentially a weekly workout framework built around three types of movement, each done three times per week:
Three strength training sessions. This includes lifting weights, bodyweight circuits, resistance bands, whatever builds muscle and challenges your body.
Three cardio sessions. This includes running, cycling, swimming, jump rope, a dance class—what counts as “cardio” is up for debate, but here, I think of it as anything that gets your heart pumping.
Three active recovery days. This includes light walking, yoga, stretching, foam rolling, and so on.
And yes, I realize this math adds up to nine intentional days of movement across a seven-day week. Here’s the thing: You do double duty some days, or skip workouts here and there, or adjust to a nine-day cycle, because the point isn’t rigid scheduling. The point is rhythm over a strict structure. For me, the 3-3-3 rule provides a sense of momentum that’s flexible enough to fit into real life, but consistent enough to actually stick to.
Why the 3-3-3 rule works for me
Before I get into how the 3-3-3 rule helped me specifically, let’s talk about why so many workout plans fall apart in the first place. I believe most of them make two classic mistakes. The first is doing too much, too soon. You go from zero to six days a week at the gym, you get burnt out, and the whole thing unravels. The second mistake is having no real structure at all—just vague intentions, like “I’ll work out when I can,” which never materializes into anything real for a lot of people.
For me, the 3-3-3 rule solves both of those problems. It gives me enough structure to build habit and momentum, but not so much intensity that my body and brain feel overwhelmed. I personally adore running, but I struggle to motivate myself to lift weights; the 3-3-3 rhythm here helped me find a middle ground between those two workouts. When I know I have three strength sessions to hit in a week (or nine-ish day cycle), I can look at my calendar and find three slots without too much drama or dread.
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There’s also plenty of breathing room built into the plan, which was the biggest game changer for me. I used to have the (toxic) thought that my rest days were wasted days, which is a mentality that led to either overtraining or complete inactivity with pretty much no middle ground.
Plus, there’s something psychologically satisfying about the number three. I know and love the rule of threes in photography, comedy, survival tips, and all over the place.
How to make a 3-3-3 workout schedule work for you
The 3-3-3 rule has a ton of wiggle room for customization. Here are some ideas for how you can approach it:
What do you think so far?
For strength days, pick a format you actually enjoy. That might be a full-body circuit, a push/pull/legs split, or a class at your gym. (Boxing, anyone?) Your focus on these days should be a progressive challenge—push yourself, yes, but don’t obliterate yourself.
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For cardio days, variety helps. Mix a longer, easier effort with a shorter, more intense session (like a 20-minute interval run). I know I’m biased, but cardio really shouldn’t feel like punishment.
For recovery days, resist the urge to “make them count” by sneaking in extra work. The whole point is to let your body consolidate the gains from your harder days. Walk, stretch, breathe, and trust the process.
Another practical tip: Pick a night to map out your 3-3-3 week ahead of time. You’ll probably find that the week arranges itself pretty naturally once you’re looking for those nine windows.
The bottom line
As always, consistency should always be your priority in fitness. If you’ve been struggling to find a rhythm, if your past workout plans have always fizzled out around week three, give the 3-3-3 rule an honest four-week try. Maybe start with a 1-1-1 month! After all, the 3-3-3 rule isn’t a hack to totally transform your physique, but I do think it can provide something way more valuable. Finding a routine that works for you—like the 3-3-3 rule works for me—is the first step to make exercise a reliable, sustainable part of your life.
We spend hours testing every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.
QLVR ENDVR: Two minute review
Most running shoes feel familiar for a reason: the formula has barely changed in millennia. We have archaeological evidence of shoes being fastened with “shoelaces” as far back as around 3,500 BC, yet the basic lace-up running trainer remains the default.
QLVR (pronounced “clever”) set out to challenge that. Its debut shoe, the ENDVR, is a laceless “running slipper” built around a women-specific mechanical structure, with a slip-on Wing Fit system inspired by the way a bird’s wing opens and closes around movement.
The brand’s core argument is blunt: most athletic shoes are designed on men’s lasts (the mechanical devise used by manufacturers to create the foot shape) and scaled down for women, even though women’s feet tend to have different shapes and pressure points. So, they decided to literally break the mould and design something specifically for women’s feet.
It sounds like a noble ambition, although it didn’t necessarily start out as one. Originally the company was focused on doing away with laces. But co-founder and footwear designer Martin Dean soon realised this would be impossible with a unisex shoe.
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“We were tweaking the design but we couldn’t get it to work. The unisex fit system means it would just be too loose on the back of a woman’s foot,” said Dean.
“That’s when we realised that the majority of footwear is made to fit a man’s foot. So we thought ‘let’s launch this for women’.”
As a runner who often struggles with shoe fit, I could immediately relate to Dean’s explanation. I spend an inordinate amount of time fiddling with laces trying to get the fit around my ankle just right. I don’t want the laces to dig in, but I also don’t want my ankles rocking around. I also struggle with the width of running shoes finding that the toe box shape is never quite right. Typically, a lot of running technology, not just shoes but also some of the best running watches, are male by default.
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When I heard about the QLVR ENDVR I was keen to try them out. Maybe, finally, this shoe would fit! Over the past couple of months, I’ve been testing the shoe on a range of activities. Treadmill intervals, 10k easy road runs, gym sessions and as an everyday trainer for trips around the shops.
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As soon as I slipped the pair on they immediately felt different. But were they the shoe I was ultimately looking for?
(Image credit: Lily Canter)
What makes it different?
The ‘women-first’ part is not just a marketing line. QLVR is designed around a more ‘triangular’ female foot shape, with a narrower heel, wider toe area, and higher arches, rather than shrinking a men’s shoe and relying on laces to make up the slack.
The laceless part is the standout: the Wing Fit system is designed to sit in a closed, ‘laced-up’ position, flexing as you step in and then holding the rearfoot securely once your heel drops. In practice, it’s the first slip-on I’ve tried that feels like it’s meant to be run in. There is an immediate locked-in feel, and the foot is held snugly inside with minimal slippage. Being able to slip on a shoe and have the perfect heel fit straight away is a revelation.
Then there’s sustainability. QLVR leans hard into bio-based materials: a dandelion-derived foam it calls Dandelite, a Pebax Rnew polymer (from castor beans) for the Wing Fit system and propulsion plate, and a Tencel yarn upper made from eucalyptus fibres.
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What it’s like to run in
The fit is the first shock. I used QLVR’s sizing guidance and went down to a UK 6.5 (I usually size up to a 7 in running shoes). Straight out of the box, they felt very snug: secure around the ankle and heel, with noticeably more arch presence than I’m used to.
But that sense of the arch’s prominence faded fast. Once I started moving, the shoe relaxed into something closer to a slipper-like comfort, without the wobbly, overly soft feeling some max-cushioned shoes can have. For easy treadmill miles, it’s been especially pleasant: quiet, stable, and easy to forget about.
The laceless convenience is not a gimmick, either. If you’re popping out for a short run, going from work to gym, or fitting training into the cracks of a day, sliding in and heading off is genuinely freeing. No lace bite across the midfoot, no fiddling to get heel lockdown just right. The rearfoot hold is simply “there” every time.
QLVR positions the ENDVR as a shoe that can handle everything from intervals to cross-training. Based on my testing, that checks out. It feels comfortable and controlled for steady running, and supportive enough for gym sessions where you’re moving laterally or lifting lightly.
But that doesn’t mean it’s perfect. For me, the snugness may be a limiter. On longer distances, feet swell and I like a little more room up front. With my toes close to the end of the shoe and a hint of heel rub developing, I’d be cautious about taking these beyond half marathon territory. But then again, they are designed as an all-round training shoe rather than a long distance running pair.
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Grip has been mostly fine on roads, but on icy patches I felt less confident than in some of my regular winter-friendly trainers. And, subjectively, the look will be divisive: the Wing Fit silhouette is unapologetically bold, and personally I think they’re pretty ugly.
One extra practical win: QLVR says you can machine-wash the shoes cold after removing the insoles and using a laundry bag.
(Image credit: Lily Canter)
Price and availability
The QLVR ENDVR costs £165 ($233, AUS $311) and is sold direct from the QLVR website. QLVR says it ships worldwide, although its FAQ notes US shipping is temporarily on hold while it assesses the impact of new import tariffs. The pricing is pretty much on-par with mid-range running and gym shoes.
QLVR ENDVR: Specifications
Swipe to scroll horizontally
Type
Neutral multi-training
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Drop
9mm drop with 35mm rear / 26mm forefoot stack height
Weight
270g (women’s size 6)
Sizing note
QLVR’s current guidance is worth considering carefully, as it is a little contradictory. The product page and FAQ suggest the shoe can size up a bit small, recommending going up half or a full size if you’re between sizes. But the size chart says if you follow its guide you don’t need to go up in size, as toe wiggle-room is built in. This is why I opted for a 6.5 after measuring my feet according to their metrics. If I wanted to run longer distances in these shoes, I would definitely size up to 7.
Move more. Sit less. For many years, that’s been accepted guidance for people wanting to get healthier.
Now that message is getting refined, with a growing body of research suggesting that certain types of movements may be more beneficial than others when it comes to health benefits.
The intensity of your exercise may matter as well. A new study published in the European Heart Journal found that a small amount of vigorous activity may be linked to lower risk of eight different chronic diseases.
The findings raise questions about why intensity matters and how people can incorporate more intense exercise routines into everyday life. To better understand the study’s implications, I spoke with CNN wellness expert Dr. Leana Wen, an emergency physician and clinical associate professor at George Washington University. She previously served as Baltimore’s health commissioner.
Before beginning any new exercise program, consult your doctor. Stop immediately if you experience pain.
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CNN: What did this study examine about exercise and its relationship to chronic disease?
Dr. Leana Wen: This investigation looked at how the intensity of physical activity is related to the risk of developing a range of chronic diseases. Researchers analyzed data from two very large groups in the UK Biobank, which is a long-term health study in the United Kingdom that tracks medical and lifestyle information from hundreds of thousands of participants. One group included about 96,000 people who wore wrist activity trackers that objectively measured their movement, and the other included more than 375,000 people who self-reported their activity.
The researchers followed participants over an average of about nine years and examined the development of eight conditions: major cardiovascular events, atrial fibrillation, type 2 diabetes, immune-related inflammatory diseases, fatty liver disease, chronic respiratory disease, chronic kidney disease and dementia, as well as overall mortality.
The key finding was that the proportion of activity done at vigorous intensity mattered. People who had more than about 4% of their total activity classified as vigorous had substantially lower risks of developing these conditions compared with people who had no vigorous activity at all. The numbers were stunning, with the participants having the following results:
63% lower risk of dementia,
60% lower risk of type 2 diabetes,
48% lower risk of fatty liver disease,
44% lower risk of chronic respiratory disease,
41% lower risk of chronic kidney disease,
39% lower risk of immune-mediated inflammatory diseases,
31% lower risk of major cardiovascular events,
29% lower risk of atrial fibrillation, and
46% lower risk of death from any cause.
These results are amazing. Imagine if someone invented a medication that could reduce the risks of all these diseases at once — it would be very popular! Crucially, even people who exercised a lot still benefited if the proportion of time they spent doing vigorous physical activity was increased. Conversely, people who were relatively inactive also benefited from adding just a little bit of higher-intensity exercise to their daily routines.
CNN: What counts as “vigorous” physical activity?
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Wen: Vigorous activity is generally defined as exercise that substantially raises your heart rate and breathing. A simple way to gauge it is the “talk test.” If you can speak comfortably in full sentences while exercising, you are likely in the low to moderate range. If you are so out of breath that you can only say a few words at a time, that is vigorous.
Running, cycling, lap swimming or climbing stairs quickly could count. But this also depends on people’s baseline fitness. For some individuals, taking longer strides with walking can be vigorous exercise. Others who are already fairly fit would need to do more. It’s also important to remember that vigorous activity doesn’t have to be in the context of a structured exercise plan. Short bursts of effort in daily life, such as rushing to catch a bus or carrying heavy groceries upstairs, can also qualify if they raise your heart rate and make you breathless.
CNN: Why might higher intensity exercise provide additional health benefits?
Wen: Higher intensity activity places greater demands on the body in a shorter period. This type of movement can improve cardiovascular fitness, increase insulin sensitivity and support metabolic health more efficiently than lower-intensity activity alone. Some studies have also linked vigorous activity with cognitive benefits.
Greater intensity may have distinct benefits across different organ systems. The researchers found that some conditions, such as immune-mediated inflammatory diseases, appeared to be more strongly linked to the intensity of activity than to the total amount. On the other hand, type 2 diabetes and kidney disease were influenced by both how much activity people did and how intense it was. Why this is the case is not yet known, but intensity appears to have a significant impact across diseases affecting multiple organs.
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CNN: How much vigorous activity do people need?
Wen: The threshold for people seeing a benefit appears to be relatively low. The researchers found that once people reached more than about 4% of their total activity as vigorous, their risk of developing chronic diseases dropped substantially.
To put that into practical terms, we are not talking about professional athletes dedicating their lives to hours of high-intensity training. Everyday people may see benefits from just doing a few minutes of vigorous effort daily.
CNN: How can people realistically incorporate vigorous activity into their daily routines?
Wen: One helpful way to think practically is that vigorous activity does not have to happen all at once. It can be accumulated in short bursts throughout the day.
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People can take the stairs instead of the elevator and do so at a faster pace than usual. When they are heading to work, they can add some speed walking. They can park farther away when grocery shopping and walk briskly while carrying groceries.
Structured exercise also can incorporate intervals where people alternate between moderate and more intense effort. If you’re swimming laps, you can warm up at a more leisurely pace, then do a few laps at a faster pace, then again at a leisurely pace and repeat. This suggestion applies to any other aerobic exercise: Aim for multiple intervals of at least 30 seconds to a minute each where your body is working hard enough that you feel noticeably out of breath.
CNN: What about someone who is older or has mobility issues?
Wen: Not everyone can or should engage in high-intensity activity in the same way. Vigorous activity is relative to that person’s baseline. For someone who is not used to exercise, even a short period of slightly faster walking or standing up repeatedly from a chair could be considered high intensity. And not everyone may be able to walk. In that case, some exercises from the chair can have aerobic benefits.
Individuals who have specific medical conditions should consult with their primary care clinicians before embarking on a new exercise routine. People with mobility issues also may benefit from working with a physical therapist who can help to tailor exercises appropriate to their specific situation.
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CNN: What is the key takeaway for people trying to improve their health?
Wen: To me, the main takeaway from this study is that it’s not only how much total exercise you get but also how hard you push yourself that matters. And you don’t have to have a lot of high-intensity exercise: Adding just a little has substantial health benefits across a wide range of chronic health conditions.
At the same time, exercise needs be practical. People should look for opportunities to safely increase intensity in ways that fit their daily lives. The most effective approach to physical activity is a balanced one: Exercise regularly, incorporate more challenging activities when you can and build habits that are sustainable over time.
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