Flex AI Workout Trainer & Log vs Fitneks
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.
Fitneks
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Fitneks is the only live fitness streaming platform built exclusively for real workouts. Train live with coaches who see you, grade your form, and push you to improve — alongside a community of real people working toward the same goals. Open your camera, join the session, and train together in real time. No more working out alone. FEATURES - Live fitness classes and challenges with real-time video - Train alongside other learners with cameras on — real accountability - Get graded on your performance by your trainer - XP leveling system — track and celebrate your progress - Send gifts to your favourite trainers during live sessions - Real-time chat during live sessions - Leaderboards and weekly fitness goals - Apple Sign In for quick and secure access WHETHER YOU'RE A TRAINER OR A LEARNER Trainers: go live from anywhere, build your audience, and get paid doing what you love. Set up in minutes, go live the same day, and start earning from your very first session. Fitneks gives trainers multiple ways to monetize every session — set entry fees for your classes, earn through live gifts from your community, and cash out directly — while paying out more than any major live streaming platform. Be your own boss, on your own schedule. Learners: no more commuting to a gym after a long day or staring at pre-recorded videos with no one watching back. On Fitneks, your trainer sees you, coaches you in real time, and grades your performance so you actually know if you're doing it right — all from wherever you are. Train alongside other motivated people with cameras on — the kind of accountability that makes you show up even when you don't feel like it. Level up, earn XP, unlock rewards, and build a streak worth protecting. Find a coach that matches your style and a community that trains with you, not just next to you. Your next workout is live. Join Fitneks.
Screenshots
Verdict
The clearest difference is update cadence: Fitneks at every 4 days against Flex AI Workout Trainer & Log's every 9 days. Fitneks also leads on iOS requirement (13.0 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 Fitneks sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Flex AI Workout Trainer & Log ships an update every 9 days, Fitneks every 4 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | Flex AI Workout Trainer & Log | Fitneks |
|---|---|---|
| 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 | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 574 MB | 114 MB |
| Age rating | 17+ | 4+ |
| Developer | Flex Artificial Intelligence Inc. | Fitneks Inc. |
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
Fitneks
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
Fitneks
- 7 Rubies Pack$1.99
- 30 Rubies Pack$7.99
- 75 Rubies Pack$17.99
Show 5 moreShow fewer
- 126 Rubies Pack$29.99
- 232 Rubies Pack$54.99
- 423 Rubies Pack$99.99
- 636 Rubies Pack$149.99
- 849 Rubies Pack$199.99
Questions
Is Flex AI Workout Trainer & Log free?
Is Fitneks free?
Do Flex AI Workout Trainer & Log or Fitneks have ads?
Which is updated more often, Flex AI Workout Trainer & Log or Fitneks?
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