Flex is the free, fun, and simple workout app that does the planning and tracking for you. Focus on your workout and achieve your goals with our fitness tracker that automatically sets the pace and difficulty for you based on your performance. Whether you’re looking to build muscle or shedding pounds to reach your weight goals, Flex is here for you.
Find hundreds of workouts and programs for your exercise preference – from lifting weights to cardio. Find and use the most effective workouts and programs designed by personal trainers, tailored to your goal and whether you work out at the gym or at home.
Forget about researching exercises or programs and keeping track of all your progress. Flex handles that with a useful exercise tracker that makes working out more engaging. Get closer to your muscle building and weight goals by keeping an eye on workout streaks and charts that monitor your progress. You can even view your friends’ training and compete alongside the entire Flex community.
Flex is the perfect fitness tracker no matter your time commitment, physical goals, experience, or equipment.
Flex’s free fitness coach will lead you through your workout step by step, telling you which exercises to do, how to do them, and how long to rest for optimal results. Get notified when to start your next set, change exercises on the fly, and even control your music – all with Flex.
Already have a fitness program you use or want to customize your own?
Edit one of our programs or build your own into Flex with the custom plan builder.
FLEX FEATURES
ALL-IN-ONE FITNESS TRACKER
- Lifting weights or cardio training, Flex tracks your gym workouts seamlessly
- Get intuitive charts and streaks to view progress and keep you motivated
- Flex can automatically change your exercise difficulty to adjust as you progress
- Apple Watch compatibility so you can focus on workouts and not your phone
MUSCLE BUILDING OR WEIGHT LOSS
- Whether it’s lifting weights or cardio training, Flex does it all
- Crush your weight goals with the exercise tracker made for you
- Hit your daily workout, build your streak on Flex, and stay on track
HELPFUL FITNESS COACH & COMMUNITY
- Get your own personal guide for exercises with in-app tutorials
- Learn what you need to know about lifting weights, ideal exercises, and optimal rest times
- Progress and stay motivated by competing and comparing results with friends and the entire Flex community
Flex lets you work out your way with two plans:
Free:
• Basic premade workout programs
• Build or customize your own program and freestyle workouts
• Workout guide and logger
• Share your workouts and routines with friends
• View your progress and stay consistent: workout calendar, exercise stats, streak, bodyweight tracker, calories tracker, steps tracker, workout notifications
Flex Premium ($9.99/month or $59.99/year):
• Logging on the Apple Watch app
• Auto Progression: Automatically increases or decreases the difficulty for your next session.
• Unlock Premium programs
• Unlock Premium freestyle workouts
• Premium workout experience: music integration, plate calculator, etc.
Download the best free and fun workout app to build muscle or lose weight fast. Guided workouts, progress tracking, and community support – Flex is the perfect way to hit your fitness goals.
Follow us and our craziness:
- Instagram @flex.ai
- TikTok @flex.app
- flexfitnessapp.com
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In-Apps
1 Month Free Premium
$0.00
Lifetime Free Premium
$0.00
Premium Yearly Subscription
$59.99
Premium Subscription Monthly
$9.99
Screenshots
User Rating
4.63 out of 5
1,696 ratings
in United States
5 star
1,365
4 star
191
3 star
47
2 star
26
1 star
67
Ratings History
Reviews
Five to three star review after the update! 🤦♂️
In the previous revision I had a 14 day plan with 7 workouts done on every other day. Now the new revision has basically disregarded the 14 day schedule I had created and turned it into a 7 day plan with workouts on everyday. I can’t see how to recreate my original scheduled plan, plans seem to have been replaced by folders. I will now have to keep track of my schedules on a separate platform or use a different app entirely. Real shame as I loved this app before.
Love this
I use this app everyday, it gives me the freedom to pick my workouts for my specific equipment, and it’s free. I have nothing bad to say about this, there are some things you have to pay for, but it isn’t necessary. Overall, I love this app.
Flex app
The flex app allows me to chose me workouts excellently
The perfect app
This is the perfect app to track your progress, log your workouts, engage with community and all of this with an excellent development team. I love this app!
Perfect (Almost)
Let me start by saying this is the best free app period. There is no free app that can beat this. I’ve tried every other one I could find and this is by far the best. I recently used the referral feature to get a lifetime of premium. The suggested workouts are nice if you don’t know exactly how to work out. The only things that bothered me was that there were certain exercises that should’ve been there that weren’t and I had to add myself. There is also no way to track which muscles specifically you’ve worked. But these are minor nitpicks and is overall the best workout app I’ve tried.
Love this app
This app has helped me create my own lifting schedule and I really like the streak feature because it helps keep me motivated! Great great great app.
Flex be flexing
Love this app I can track and customize my workouts even with the free version.
Flex.App
I love the variety of exercises you can choose from, and the amount of workouts as well.But if there is an missing exercise I can just create one also, this is why I love Flex.
Best Workout App for Intermediate and Advanced Training
I’ve been weight training for about 15 years and one of the biggest keys to success in the gym is consistency workout to workout. Flex is built exactly for this. It allows you to build your own workouts in a simple, easy to use format. There are premade workouts available for beginners but I don't think this is really the app’s strength. It remembers your last weight and set for each exercise and carries it over to the next workout. It tracks your rest (which you can customize) And if you make modifications intra-workout, you can save those for the next time as well. The stats dashboard is helpful for tracking progress, though could use some improvement and more detail. Try it out for free, but if you have an apple watch, you’ll definitely want to pay for it, the logging on the watch has changed my ability to stay focused and keep my phone away while working out. Overall an amazing app if you want a highly customizable, simple interface logging app that doesn't push a specific training style or set of workouts.
Awesome app but messes w Apple fitness
All around great app, only annoying thing is that if u have an Apple Watch it’ll keep ending ur workout thru Apple fitness
