Flex AI Workout Trainer & Log vs TRNR
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.
TRNR
Access a wide range of high-quality workout guides with video and image demonstrations. Whether you're a beginner or an experienced athlete, find the equipment and guidance to achieve your fitness goals and maintain a healthy lifestyle. Save your favorite workouts for easy access anytime.
- High-quality workout guides
- Video and image demonstrations
- Equipment and guidance for all levels
- Save and bookmark favorite workouts
- Achieve fitness goals
- Stay healthy
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Welcome to our app! We are proud to offer a wide selection of high-quality workout guides that will help you reach your fitness goals. Our app features video and image guides of our various products , so you can get a feel for how they work and how to use them properly. Whether you're a beginner looking to start a fitness journey or a seasoned athlete looking to up your game, we've got the equipment and guides you need. We've got everything you need to get fit and stay healthy. In addition to our guides, you can save or bookmark your favorite workouts and go through them whenever you want. So why wait? Download our app and start building the body you've always wanted today!
Screenshots
Verdict
The clearest difference is in-app purchases: TRNR at none against Flex AI Workout Trainer & Log's 8. TRNR also leads on review sentiment (100% vs 69%) and iOS requirement (13.0 vs 18.0). On price, update cadence, ads 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 8 in-app purchases, starting at $12.99 per month. TRNR asks for nothing beyond the download.
Flex AI Workout Trainer & Log ships an update every 9 days, TRNR every 10 days. The most recent releases landed on October 14, 2026 and September 27, 2026 respectively.
| Parameter | Flex AI Workout Trainer & Log | TRNR |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.4K ratings) — better | — |
| Positive reviews | 69.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2.4K — better | — |
| Update frequency | Every 9 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 574 MB | 22 MB |
| Age rating | 17+ | 17+ |
| Developer | Flex Artificial Intelligence Inc. | TRNR |
Customer experience
Flex AI Workout Trainer & Log
TRNR
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
TRNR
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
- 1 Month Free PremiumFree
- Lifetime Free PremiumFree
TRNR
No in-app purchases
Questions
Is Flex AI Workout Trainer & Log free?
Is TRNR free?
Do Flex AI Workout Trainer & Log or TRNR have ads?
Which is updated more often, Flex AI Workout Trainer & Log or TRNR?
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