Comparison

Flex AI Workout Trainer & Log vs Gym Buddy Tracker

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

Gym Buddy Tracker

This app helps you personalize your fitness journey by creating and tracking custom workouts. Monitor your progress, manage weights, and optimize rest periods. Explore a library of routines or build your own for any fitness level.

Highlights
  • Create custom workouts
  • Track workout progress
  • Manage weights and reps
  • Optimize rest periods
  • Library of workout routines
  • Build custom routines
Features
Read full description

Introducing Gym Buddy Tracker: your ultimate fitness companion! This app empowers you to personalize your fitness journey by adding and tracking your own workouts. With Gym Buddy Tracker, you can easily monitor your progress, manage weights, and optimize your rest periods between sets. Dive into our extensive library of workout routines tailored for various fitness goals. Whether you're interested in adhering to a structured plan or prefer to mix and match components to create a custom routine, Gym Buddy Tracker offers versatile solutions for every fitness level. Start your journey towards better health and fitness today! Gym Buddy Pro subscription: Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your iTunes account will automatically be charged at the renewal price within 24 hours prior to the end of the current period unless you change your subscription preferences in your App Store account settings. You can manage your subscriptions at any time through your App Store account settings after purchase. Any unused portion of a free trial period will be forfeited when making a purchase of an auto-renewing subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gymbuddytracker.web.app/privacy-policy/

Screenshots

Flex AI Workout Trainer & Log4 screens
Gym Buddy Tracker4 screens

Verdict

The call

The clearest difference is review sentiment: Gym Buddy Tracker at 100% against Flex AI Workout Trainer & Log's 69%. Gym Buddy Tracker also leads on rating (5.0 vs 4.6) and iOS requirement (15.6 vs 18.0). Flex AI Workout Trainer & Log's advantage is ratings volume (2.4K vs 2) and update cadence (every 9 days vs every 3 weeks). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flex AI Workout Trainer & Log sells 6 in-app purchases, starting at $12.99 per month and Gym Buddy Tracker sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Gym Buddy Tracker holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flex AI Workout Trainer & Log has 2.4K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 69% of Flex AI Workout Trainer & Log's written reviews are positive against 100% of Gym Buddy Tracker's.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Gym Buddy Tracker every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Flex AI Workout Trainer & Log versus Gym Buddy Tracker: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogGym Buddy Tracker
PriceFreeFree
Rating4.6 (2.4K ratings)5.0 (2 ratings) — better
Positive reviews69.0% of reviews100.0% of reviews — better
Number of ratings2.4K — better2
Update frequencyEvery 9 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS18.015.6 — better
Further details — not scored
Size574 MB96 MB
Age rating17+4+
DeveloperFlex Artificial Intelligence Inc.Mattia Biondani

Customer experience

Flex AI Workout Trainer & Log

All ratings2,412 ratings
Positive92.0%
Neutral2.6%
Negative5.4%
Written reviews310 reviews
Positive69.0%
Neutral6.5%
Negative24.5%

Gym Buddy Tracker

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Gym Buddy Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 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
2 purchases

Gym Buddy Tracker

Subscriptions2
  • Gym Buddy PRO Monthly1 Month trial$0.991 Month
  • Gym Buddy PRO Yearly1 Month trial$9.991 Year

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is Gym Buddy Tracker free?
Gym Buddy Tracker is free to download, with in-app purchases available.
Which has better reviews, Flex AI Workout Trainer & Log or Gym Buddy Tracker?
Gym Buddy Tracker is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while Gym Buddy Tracker averages 5.0 from 2 ratings.
Do Flex AI Workout Trainer & Log or Gym Buddy Tracker have ads?
Neither Flex AI Workout Trainer & Log nor Gym Buddy Tracker shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or Gym Buddy Tracker?
Flex AI Workout Trainer & Log ships an update every 9 days, and Gym Buddy Tracker every 3 weeks. Most recently, Flex AI Workout Trainer & Log was updated on November 2, 2026 and Gym Buddy Tracker on November 3, 2026.

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