Comparison

Flex AI Workout Trainer & Log vs Repza

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • AI personal trainer
  • Real-time form feedback
  • Personalized workout plans
  • Adaptive progression
  • Strength tracking
  • Community leaderboards
  • Apple Watch integration
Features
Read full description

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.

About

Repza

Features
Read full description

MASTER YOUR OWN BODY Receive coaching from anywhere. Record yourself performing a movement and Kinetiq analyses your form, providing detailed feedback on key aspects of your technique. Based on your ability, goals and analysis, Kinetiq also recommends workouts to help guide your training. By purchasing a Kinetiq subscription you'll unlock everything in the app. AI FORM ANALYSIS Record your calisthenics movements and receive AI-powered analysis of your technique. Kinetiq evaluates key form indicators such as body alignment, joint positioning, range of motion and movement quality, giving you clear feedback on what you're doing well and where you can improve. RECOMMENDED WORKOUTS Turn your analysis into action. Kinetiq recommends workouts based on your current ability and training goals, helping you focus on exercises relevant to your level. Whether you're working on your first push-up or progressing toward more advanced calisthenics movements, Kinetiq helps give your training direction. TRAIN. ANALYSE. IMPROVE. With Kinetiq, you can: Analyse your calisthenics form using AI Receive detailed feedback on your technique Identify areas of your movement that need improvement Get recommended workouts based on your ability and goals Train across push, pull and lower-body movements Work towards more advanced calisthenics skills No complicated equipment. Just you, your bodyweight and smarter training. IMPORTANT Kinetiq's AI-generated form analysis and workout recommendations are provided for general fitness and informational purposes only. They are not a substitute for professional medical, physiotherapy or qualified coaching advice. Exercise carries an inherent risk of injury. Always train within your abilities and seek professional advice where appropriate. Unlock Kinetiq for either: • $9.99/week • $34.99/year (3-day free trial) END USER LICENSE AGREEMENT (EULA) Kinetiq uses Apple's Standard End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flex AI Workout Trainer & Log4 screens
Repza4 screens

Verdict

The call

The clearest difference is update cadence: Repza at every 4 days against Flex AI Workout Trainer & Log's every 9 days. Repza also leads on iOS requirement (16.4 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 per month and Repza sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Repza every 4 days. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 8 level
Flex AI Workout Trainer & Log versus Repza: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogRepza
PriceFreeFree
Rating4.6 (2.4K ratings) — better—
Positive reviews69.0% of reviews—
Number of ratings2.4K — better—
Update frequencyEvery 9 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS18.016.4 — better
Further details — not scored
Size574 MB69 MB
Age rating17+17+
DeveloperFlex Artificial Intelligence Inc.Romeo Rivera

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

Repza

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Flex AI Workout Trainer & Log

Subscriptions6
  • Premium Subscription Monthly$12.991 Month
  • Premium Plus Monthly$29.991 Month
  • Premium Plus Family Monthly$69.991 Month
Show 3 more
  • Premium Yearly Subscription$79.991 Year
  • Premium Plus Yearly7 Days trial$191.991 Year
  • Premium Plus Family Yearly7 Days trial$499.991 Year
One-time2
  • 1 Month Free PremiumFree
  • Lifetime Free PremiumFree
2 purchases

Repza

Subscriptions2
  • Kinetiq Pro Subscription$9.997 Days
  • Kinetiq Pro + Subscription3 Days trial$34.991 Year

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is Repza free?
Repza is free to download, with in-app purchases available.
Do Flex AI Workout Trainer & Log or Repza have ads?
Neither Flex AI Workout Trainer & Log nor Repza shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or Repza?
Flex AI Workout Trainer & Log ships an update every 9 days, and Repza every 4 days. Most recently, Flex AI Workout Trainer & Log was updated on October 17, 2026 and Repza on October 11, 2026.

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