Your AI-Powered Gym Tracker & Personal Trainer
Smash your fitness goals with Flex – the ultimate AI workout tracker that plans, tracks, and adapts to your progress. No more guesswork! Whether you're lifting weights, building muscle, or losing weight, Flex helps you stay on track and push past plateaus.
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Smarter Gym Tracking, Faster Progress
- Track every lift & rep automatically – no need for a manual gym logbook.
- AI-powered workouts that adjust difficulty based on your performance.
- See your gains with real-time charts and streaks.
- Sync with Apple Watch for hands-free workout tracking.
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Your AI Personal Trainer
- Get expert guidance from an AI fitness coach that adapts to you.
- Auto-adjusts weight, reps, and sets to maximize strength gains.
- Get reminders and real-time coaching on form, rest, and intensity.
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Build Muscle, Lose Weight, Stay Motivated
- Follow structured workout programs or create your own.
- Log every gym session with our lifting log and workout notebook.
- Join the Flex community to compare progress and compete with friends.
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Free vs. Premium Plans
Free Plan:
- Access premade workouts
- Track workouts & progress
- Customize your training plans
Flex Premium (CA$12.99/month or CA$79.99/year):
- Apple Watch logging
- Auto Progression: Adjusts difficulty automatically
- Premium training programs & freestyle workouts
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Download Flex Now – Your AI Coach Awaits!
Smash PRs. Track Gains. Train Smarter.
Join thousands of lifters & athletes who trust Flex to track progress and take their gym routine to the next level.
Download now and start lifting smarter!
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Follow us for tips & updates:
Instagram: @flex.ai
TikTok: @flex.app
Website: flexfitnessapp.com
Thank you so much for helping us to achieve the right work out with out hassle so quick and affordable , it is very simple and helpful for everybody .Well done MOJGANSS
Developer Response
☺️
Simple And Easy
Micar
Full disclosure, I was lucky enough to be part of the beta testing. The app was great through the testing and was nearly flawless and rock solid. It is easy to set-up, use and track progress. I tried a few others before but found them awkward. I like the ability to link in Apple and Spotify music as well to keep me motivated through my workouts.
Developer Response
Thanks for your awesome review 🙏☺️
Number 1 Best workout app in 2024
Kuzuri10
This was by far the most simple,aesthetic,cleanest and best workout app I have ever downloaded and I did not regret it and belive me I have tried over 30 workout apps and this was the best
My workouts keep disappearing
Jxhnnyboi
The app’s concept is great but every time it updates it deletes all my workouts. This is the second time I’ve logged in with all my custom freelance workouts gone. No I have to recreate them all from scratch again
Developer Response
Hey there, we can investigate what’s wrong with your account if this is still happening (should be fixed in our latest update) - please email us support@flexfitnessapp.com
• New design: Flex now has a revamped interface with a modern look and improved usability.
• Smarter AI trainer: Lex now creates and progresses your workouts with even more precision and intelligence.
• Performance improvements and bug fixes.
Version 3.1
The developer, Flex Artificial Intelligence Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Health & Fitness
Location
Contact Info
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
