Flex AI Workout Trainer & Log vs FUEL THRIVE GROW
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
FUEL THRIVE GROW
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Fuel Thrive Grow Personalized coaching made simple, supportive, and seriously effective Fuel Thrive Grow is your all-in-one app for 1-on-1 coaching that helps you build confidence, consistency, and a routine you actually enjoy. Created by future registered dietitian Addison Buesing, FTG blends structure with flexibility so you can finally stop starting over and start seeing real progress. What’s inside • A fully customized meal plan with your personal macro goals • Workout programming that fits your goals, lifestyle, and schedule • Weekly check-ins with personalized feedback and updates • Direct messaging with your coach for daily support and guidance • Progress tracking for weight, photos, measurements, and habits • A private resource folder full of tools, guides, and templates • One space to stay organized, consistent, and on track This isn’t a one-size-fits-all plan It’s a full coaching experience that meets you where you are and grows with you Fuel your body Thrive in your routine Grow into the version of you that’s been waiting to break through Real coaching. Real results. Built around your life. Log in with your FTG coaching account to get started *App access requires a paid coaching plan. Terms Of Use: https://kahunas.io/terms-conditions Privacy Policy: https://kahunas.io/privacy
Screenshots
Verdict
The clearest difference is update cadence: Flex AI Workout Trainer & Log at every 9 days against FUEL THRIVE GROW's every 6 weeks. FUEL THRIVE GROW's advantage is iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support 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. Flex AI Workout Trainer & Log sells 6 in-app purchases, starting at $12.99 per month and FUEL THRIVE GROW sells 1 in-app purchase, starting at $299.99 per month. Whichever you choose, the download price is not the number that matters.
Flex AI Workout Trainer & Log ships an update every 9 days, FUEL THRIVE GROW every 6 weeks. The most recent releases landed on November 2, 2026 and September 30, 2026 respectively.
| Parameter | Flex AI Workout Trainer & Log | FUEL THRIVE GROW |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.4K ratings) — better | — |
| Positive reviews | 69.0% of reviews | — |
| Number of ratings | 2.4K — better | — |
| Update frequency | Every 9 days — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 574 MB | 56 MB |
| Age rating | 17+ | 17+ |
| Developer | Flex Artificial Intelligence Inc. | Addison Buesing |
Bugs and 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
FUEL THRIVE GROW
Not enough reviews yet to summarise bugs or requests.
In-app purchases
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
FUEL THRIVE GROW
- FTG Monthly Coaching$299.991 Month
Questions
Is Flex AI Workout Trainer & Log free?
Is FUEL THRIVE GROW free?
Do Flex AI Workout Trainer & Log or FUEL THRIVE GROW have ads?
Which is updated more often, Flex AI Workout Trainer & Log or FUEL THRIVE GROW?
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