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 plateaux.
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Smarter Gym Tracking, Faster Progress
- Track every lift & rep automatically – no need for a manual training diary.
- AI-driven workouts that adjust difficulty based on your performance.
- Track progress visually 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 maximise strength gains.
- Receive reminders & real-time coaching on form, rest time, and intensity.
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Build Muscle, Lose Weight, Stay Motivated
- Follow structured workout programmes or create your own.
- Log every gym session with our lifting log and training diary.
- Compete & compare progress with friends in the Flex community.
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Free vs. Premium Plans
*Free Plan:
- Access premade workouts
- Track workouts & progress
- Customise your training plans
*Flex Premium (£8.99/month or £54.99/year):
- Apple Watch logging
- Auto Progression: Adjusts difficulty automatically
- Premium training programmes & freestyle workouts
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Download Flex Now – Your AI Coach Awaits!
Smash PBs. Track Gains. Train Smarter.
Join thousands of lifters & athletes who trust Flex to track workout 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
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In-Apps
Premium Yearly Subscription
€63.99
Premium Subscription Monthly
€10.49
Screenshots
FAQ
Is Flex AI Workout Trainer & Log free?
Yes, Flex AI Workout Trainer & Log is free to download, however it contains in-app purchases or subscription offerings.
Is Flex AI Workout Trainer & Log legit?
✅ The Flex AI Workout Trainer & Log app appears to be high-quality and legitimate. Users are very satisfied.
Thanks for the vote
How much does Flex AI Workout Trainer & Log cost?
Flex AI Workout Trainer & Log has several in-app purchases/subscriptions, the average in-app price is €37.24.
What is Flex AI Workout Trainer & Log revenue?
To get estimated revenue of Flex AI Workout Trainer & Log app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.
User Rating
4.71 out of 5
28 ratings in Spain
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Ratings History
Reviews
Perfect for improving your technique
I got to beta test ai form feeedback & I'm really impressed with how well the AI detects exercise form and gives accurate, helpful feedback, it points out things that are hard to notice on your own. The app is intuitive and easy to use, perfect for beginners or anyone looking to improve their technique.
It would be great to see more exercises added, and a visual guide during recording would help with camera placement and positioning.
Start the workout in watch without the phone
Would be cool if you could start the workout in the apple watch without the iphone
I like it so far
I only wish it was available in other languages like Spanish
Muy buena
Me gusta mucho, funciona perfecto y tiene gran cantidad de ejercicios para hacer aunque los planes que la app te hace segun tus necesidades se quedan cortos sin el premium.
Not a free app
The app promotes that it’s free but much of the content is available only through a paid subscription. You can search online for workout routines and create your own workout which is rather handy
I 🩵 It
I admire the widget because it allows me to see what I have planned for the day without opening the app, I recently just updated the app and found a whole new adjustments and changes that I immediately heavily fell in love with.
• I like how I can add a certain workout to any day, whether its biweekly, weekly, etc.
• I love the gym community so this is pretty much my comfort spot, and I love how much people are sharing their progress!
• And I like when I'm done creating a workout for some other day, It's based on an estimate on how many calories I burn, and how long it'll take for me to finish that workout.
I love this Workout overall, it's helped me watch my calorie burning, steps taking, and shows me how to correctly do a couple of workouts that I haven't done before.
Very fun
Very easy to use. My favorite workout tracker. I love the 1 rep max calculator and rankings against other users. Super fun
Almost great
I was so excited to use this app but after a few weeks, I canceled my subscription. It has a beautiful design and I love that you can create custom exercises but the plate calculator and AI progression are very glitchy and not working properly. This app may be great if they fix glitches but for now, I’ll stick with Alpha Progression.
Good for detailed tracking
Great for saving workouts whether these are cardio, calisthenics, or strength training. The app has a bank of exercises to choose from and if needed, you can create custom ones. You can group exercises into supersets and set rest times between reps. Also, if competition and point systems motivate you to exercise, then this app is for you! You earn points for every workout and can unlock achievements for more points. If you really want to unleash your competitiveness, view the rankings. It’ll really humble you.
I left off a star because it’d be more convenient if I could add workouts anytime like the MyFitness App, which allows you to manually fill out the date and time for any previous day. I like this because sometimes I forget to track workouts and this app (at least the free version) doesn’t allow you to add a workout to a previous day.
I like it
This is really my first experience with an app like this, but I find it is really easy to use and it keeps me motivated and focused. Highly recommend.
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