Comparison

Flex AI Workout Trainer & Log vs Gym 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 Tracker

Log workouts, track progress, and achieve fitness goals with this comprehensive gym companion. Features include customizable plans, an extensive exercise library with demos, body metric tracking, and personalized meal plans. Stay motivated with community features and offline accessibility.

Highlights
  • Effortless workout logging
  • Customizable workout plans
  • 1300+ animated exercise demos
  • Body metrics tracking
  • Progress stats and analytics
  • Personalized meal plans
  • Offline accessibility
Features
Read full description

Gym Tracker is a simple workout tracker and log for weight lifting and strength training. Log sets, reps and weight in seconds, follow a proven program, and watch your strength grow. No clutter and no account needed. Open the app, pick your exercises, and train. WHY LIFTERS USE GYM TRACKER • Fast workout log: add sets, reps, weight (kg or lb), time or distance with a tap. Mark warm-up, easy, hard and drop sets, and pair exercises into supersets. • Rest timer that follows you: starts after each set, adjusts by 15 seconds, and stays on your Lock Screen and Dynamic Island with a Live Activity. • Guided workouts: follow today's session one exercise at a time. Tap "Done & Log Set", rest, repeat until the workout is complete. • 9 ready-made programs: Full Body, Half Body, Push Pull Legs and 4- and 5-day splits for beginner, intermediate and advanced lifters. Or build your own routine. • 1,300+ exercises with animated demos and step-by-step instructions. Filter by 19 target muscles and 14 equipment types, or add your own exercises. TRACK YOUR PROGRESS • Strength charts for every exercise: estimated one-rep max (1RM), volume, max weight and max reps. • Workout history in a calendar, with daily totals for weight lifted, sets and reps. • Body measurements: weight, body fat %, waist, arms and more, with charts and optional photos. • Home Screen and Lock Screen widgets for today's workout, your streak and your weekly volume. GYM TOOLS • 1RM calculator, plate calculator, BMI, daily calories and heart rate zones. • Barcode food scanner and ready-made meal plans. • Workout reminders on your training days. • A notebook for training notes, and separate diaries for different goals. YOUR DATA STAYS YOURS • Automatic daily iCloud backup with easy restore. • Export your workouts to CSV or JSON anytime. • Log workouts offline. Your training data is stored on your device. TRAIN WITH OTHERS After 3 workout days, sign in to unlock the community: find gyms near you and see who is training there right now. Available in English, French and Arabic, in light and dark mode. GYM TRACKER PRO Gym Tracker is free to use. Pro removes ads, unlocks HD exercise animations, and adds the Streak and Progress widgets. Pro is offered as a monthly or yearly auto-renewing subscription. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Privacy Policy: https://kreatordev.com/gymtracker/privacy Terms of Use: https://kreatordev.com/gymtracker/terms Questions or ideas? Email us at mobile@kreatordev.com

Screenshots

Flex AI Workout Trainer & Log4 screens
Gym Tracker4 screens

Verdict

The call

The clearest difference is ads: Flex AI Workout Trainer & Log at none against Gym Tracker's shown. Flex AI Workout Trainer & Log also leads on update cadence (every 9 days vs every 4 months) and ratings volume (2.4K vs 5). Gym Tracker's advantage is iOS requirement (15.0 vs 18.0). On price, rating, 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 8 in-app purchases, starting at $12.99 per month and Gym Tracker sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Gym Tracker holds the better App Store score, 4.8 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 5, so its average is the more settled of the two.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Gym Tracker every 4 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard4 real differences · 6 level
Flex AI Workout Trainer & Log versus Gym Tracker: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogGym Tracker
PriceFreeFree
Rating4.6 (2.4K ratings)4.8 (5 ratings) — better
Positive reviews69.0% of reviews—
Number of ratings2.4K — better5
Update frequencyEvery 9 days — betterEvery 4 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size574 MB66 MB
Age rating17+4+
DeveloperFlex Artificial Intelligence Inc.KREATORDEV LLC

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 Tracker

All ratings5 ratings
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 Tracker

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

Gym Tracker

Subscriptions2
  • Unlock Pro Features$1.991 Month
  • Unlock Pro Features$17.991 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 Tracker free?
Gym Tracker is free to download, with in-app purchases available.
Which has better reviews, Flex AI Workout Trainer & Log or Gym Tracker?
Gym Tracker is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while Gym Tracker averages 4.8 from 5 ratings.
Do Flex AI Workout Trainer & Log or Gym Tracker have ads?
Gym Tracker shows ads; Flex AI Workout Trainer & Log does not.
Which is updated more often, Flex AI Workout Trainer & Log or Gym Tracker?
Flex AI Workout Trainer & Log ships an update every 9 days, and Gym Tracker every 4 months. Most recently, Flex AI Workout Trainer & Log was updated on October 29, 2026 and Gym Tracker on October 27, 2026.

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