Fitain vs Flex AI Workout Trainer & Log
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fitain
Log workouts with precision, track your progress, and discover over 3,000 exercises. Fitness professionals can also sell training programs and scale their business. Integrates with popular wearables and fitness apps.
- Log workouts with precision
- Track progress over time
- Access 3,000+ exercise videos
- Sell training programs
- Integrate with wearables
- Discover pro-planned workouts
- Manage clients and payments
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Log workouts. Improve progress. Sell training programs. Fitain’s workout tracking app helps gym-goers train better & coaches build a new income stream. Start free today. Whether you’re tracking workouts or scaling a fitness business, Fitain makes it easy. With a library or 3,000+ exercise videos and how-tos, fitness app integrations, and in-depth health data, Fitain is built to help those who train—from casual gym-goers to fitness professionals—train better. FOR GYM-GOERS & FITNESS ENTHUSIASTS: - Track workouts with precision – log every rep, set, weight, and progress metric. - See more progress over time – workout history, PR tracking & heat maps help you improve. - Find or build the perfect plan – create custom plans or explore 3,000+ exercises. - Sync with wearables & fitness apps – connect with MyFitnessPal, Fitbit, Strava, Oura & more. - Find pro-planned workouts in 60+ categories – from HIIT, CrossFit, and strength training to yoga, boxing, mobility, & more. - Discover & connect with trainers – browse professionals, book remote coaching sessions, or get expert guidance. FOR PERSONAL TRAINERS & COACHES: - Sell online training programs, starting today – monetize your expertise in minutes. - Scale beyond 1:1 coaching – help more people without working more hours. - Manage clients with ease – Unlike other personal training software, Fitain handles client onboarding and payments for you. - Set your own prices – charge what you want for one-time programs or multi-week plans. - Use our 3,000+ video library or upload your own – create workouts your way. - Protect your income – if a client shares your program, the other person still has to pay. WHY FITAIN? - Instantly find the right workout – Every person and plan has a unique colour match to help you find the best fit. - No tech headache – drag-and-drop workout builder for easy program creation. - Passive income for trainers – create once, sell forever, stop trading hours for cash. - Flexible for every training style – more precise tracking across all your activities. - Clients can join instantly – share a simple link or QR code, Fitain handles the rest. - Your all-in-one fitness hub – use it as your gym log, training planner, or hub for fitness business growth. - Bring your fitness support network online – Keep everyone from accountability partners to your trainer and physiotherapist in the loop. - Free forever – train smarter at no cost, with premium upgrades available. FAQ - How much does it cost? Using Fitain is free and always will be. A premium subscription (£39.99/year) gives you access to multi-week programs, detailed progress tracking, and the ability to sell workout programs. Fitain takes a 10% commission per sale, which most coaches build into their pricing. - Can I really track any fitness activity? Yes! Tell Fitain your fitness goals and interests out of 60+ categories, and use the color matching system to find workouts that are a good fit. From ballet dancing sports coaches to skateboarding holistic therapists and everyone in between, they’re all here. - How do I get paid through Fitain as a trainer or coach? Connect your Stripe account, create a program in minutes using our library of exercises, and start selling! Fitain automatically handles payments for you. No chasing payments, just seamless payouts when you make a sale. - Can I use Fitain as a trainer or coach even if I’m not tech-savvy? Yes! Fitain is easy to use even if you’re not familiar with fitness apps. No coding or complex setup necessary. You can drag, drop, and customize your programs in minutes. Clients join your program with a simple link or QR code, and the app handles onboarding and payment automatically. Outsmart plateaus, make real progress, and build movement habits that stick. Make every session count with Fitain. Download and start free today. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Flex AI Workout Trainer & Log
This app uses AI to provide personalized workout plans and real-time form feedback for weightlifters. It tracks progress, offers adaptive progression, and includes motivational features like leaderboards and streaks. It's designed for all experience levels, from beginners to pros.
- AI personal trainer
- Real-time form feedback
- Personalized workout plans
- Adaptive progression
- Strength tracking
- Community leaderboards
- Apple Watch integration
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Flex AI is the world’s first true AI personal trainer — built for lifters who want to train smarter, progress faster, and perfect their form. Whether you’re chasing size, strength, or consistency, Flex uses real-time AI to guide every rep, adjust your program, and keep you motivated through challenges, leaderboards, and streaks. - Your AI Coach, Every Rep Personalized workouts built automatically by AI personas that learn your goals, history, and preferences. Real-time form feedback powered by patented computer-vision AI — get instant corrections on squats, bench, deadlift, rows, and more. Adaptive progression and deloading backed by sports-science principles — no spreadsheets, no guesswork. - Train Smarter — See Results AI tracks your strength curve and increases weight when you’re ready. Visual progress graphs show PRs, volume, and recovery trends. Track sets, reps, and tempo with a tap — or automatically with Apple Watch. - Stay Motivated & Connected Join a global community of lifters. Compete on leaderboards, build streaks, and earn badges. Post progress photos, celebrate milestones, and share results. - Accessible to Everyone Free to start with all core features included. Upgrade anytime for advanced AI coaching and premium analytics. Designed for all experience levels — from beginners to pros. - Why Flex AI Real-time AI form feedback (patented) Adaptive, science-based programming Progress tracking & recovery insights Gamified streaks + leaderboards Apple Watch integration Built for hypertrophy & strength goals Start Training Smarter — Today Download Flex AI and experience personal training powered by real AI. Perfect your form. Unlock your best lift. Train smarter — free on iPhone + Apple Watch.
Screenshots
Verdict
The clearest difference is update cadence: Flex AI Workout Trainer & Log at every 9 days against Fitain's every 6 weeks. Fitain's advantage is review sentiment (78% vs 69%) and iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Fitain sells 4 in-app purchases, starting at $4.99 per month and Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.
Fitain ships an update every 6 weeks, Flex AI Workout Trainer & Log every 9 days. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.
| Parameter | Fitain | Flex AI Workout Trainer & Log |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (2.4K ratings) — better |
| Positive reviews | 77.8% of reviews — better | 69.0% of reviews |
| Number of ratings | — | 2.4K — better |
| Update frequency | Every 6 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 68 MB | 574 MB |
| Age rating | 12+ | 17+ |
| Developer | L33 Solutions Ltd. | Flex Artificial Intelligence Inc. |
Customer experience
Fitain
Flex AI Workout Trainer & Log
Bugs and requests
Fitain
Not enough reviews yet to summarise bugs or requests.
Flex AI Workout Trainer & Log
Reported bugs
3 issues- App crashes on iOS 16 update
- Inability to log workouts on previous days
- Inconsistent syncing between app and Apple Watch
Requested features
4 requests- Offline workout mode
- Ability to save and reuse custom workout plans
- Muscle group targeting and analytics
- Social features and community integration
In-app purchases
Fitain
- Supporter Monthly$4.991 Month
- Premium Pro Monthly$9.991 Month
- Supporter Yearly1 Month trial$39.991 Year
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- Premium Pro Yearly1 Month trial$99.991 Year
Flex AI Workout Trainer & Log
- Premium Subscription Monthly$12.991 Month
- Premium Plus Monthly$29.991 Month
- Premium Plus Family Monthly$69.991 Month
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- Premium Yearly Subscription$79.991 Year
- Premium Plus Yearly7 Days trial$191.991 Year
- Premium Plus Family Yearly7 Days trial$499.991 Year
- 1 Month Free PremiumFree
- Lifetime Free PremiumFree
Questions
Is Fitain free?
Is Flex AI Workout Trainer & Log free?
Do Fitain or Flex AI Workout Trainer & Log have ads?
Which is updated more often, Fitain or Flex AI Workout Trainer & Log?
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