Comparison

Flex AI Workout Trainer & Log vs FitYogurt

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

FitYogurt

Easily log and track your strength training sessions. This app helps you record sets, weights, and reps, analyze your progress, and estimate your one-rep max. Share your workouts and discover over 200 exercise videos to enhance your training.

Highlights
  • Log unlimited workouts
  • Create custom exercises
  • View daily workout logs
  • Get 1 Rep max estimates
  • 200+ built-in exercise videos
  • Share workouts
Features
Read full description

Want to stay in shape?  Many people like to use the gym while they're at it. However, they often have trouble keeping track of their workouts. And as you know, not tracking workouts can slow down strength gains. That's why we created RepItDown. It is a smart tracker that will help you keep track & share your workouts. RepItDown is a quick and simple workout tracker for strength training. It will help you log your workouts, lift heavier weights and analyse the results. You can track unlimited workouts, add as many custom exercises as you like, free without ads. Inspire others by sharing your workouts. Features: - View and navigate daily workout logs quickly by swiping between dates. - Move to a specific day using the inbuilt calendar. - Add an exercise to the workout log and record sets of weight, reps, distance, calories or time. - Create custom exercises to suit your training needs. - Get 15+ days workout history, performance, within the exercise. - Get 1 Rep max estimates for your next workout. - 200+ built-in exercises videos against categories such as Chest, Back, Legs, Shoulders etc. - Clone exercise from past workouts. - Share workouts. So, what are you waiting for ? Improve with each set. Don’t just workout, write it down or as we say, RepItDown.

Screenshots

Flex AI Workout Trainer & Log4 screens
FitYogurt4 screens

Verdict

The call

The clearest difference is in-app purchases: FitYogurt at none against Flex AI Workout Trainer & Log's 8. FitYogurt also leads on rating (5.0 vs 4.6) and iOS requirement (12.0 vs 18.0). Flex AI Workout Trainer & Log's advantage is ratings volume (2.4K vs 1). 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

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. FitYogurt asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FitYogurt 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 1, so its average is the more settled of the two.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
Flex AI Workout Trainer & Log versus FitYogurt: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogFitYogurt
PriceFreeFree
Rating4.6 (2.4K ratings)5.0 (1 ratings) — better
Positive reviews69.0% of reviews—
Number of ratings2.4K — better1
Update frequencyEvery 9 daysWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS18.012.0 — better
Further details — not scored
Size574 MB58 MB
Age rating17+4+
DeveloperFlex Artificial Intelligence Inc.Dinu Devarajan

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

FitYogurt

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
None

FitYogurt

No in-app purchases

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is FitYogurt free?
FitYogurt is free to download, with no in-app purchases.
Which has better reviews, Flex AI Workout Trainer & Log or FitYogurt?
FitYogurt is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while FitYogurt averages 5.0 from 1 ratings.
Do Flex AI Workout Trainer & Log or FitYogurt have ads?
Neither Flex AI Workout Trainer & Log nor FitYogurt shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or FitYogurt?
Flex AI Workout Trainer & Log ships an update every 9 days, and FitYogurt weekly. Most recently, Flex AI Workout Trainer & Log was updated on October 29, 2026 and FitYogurt on October 27, 2026.

Other comparisons