Comparison

Flex AI Workout Trainer & Log vs Gymijet

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

Gymijet

Achieve your fitness goals with focused 15-minute workouts that deliver the benefits of an hour at the gym. This portable solution helps you see results in just 4 weeks, fitting seamlessly into your daily routine.

Highlights
  • 15-minute focused workouts
  • Full-body exercise
  • Portable and convenient
  • Visible results in 4 weeks
  • Fits any schedule
Features
Read full description

Imagine your best body. In the mirror. In 4 weeks. Now you can get the benefits of an hour at the gym in one focused 15-minute workout you can do anywhere, anytime. Gymijet distills a full-body workout to its essence. It’s small enough to throw in your bag and take anywhere you go, it costs less than just two months at the gym, and you’ll see results in 4 weeks. And so will everyone you know. Get your best body back without overthinking. Gymijet fits into your day-to-day, no matter where or when that works best for you. The better version of you is right here. License Agreement / Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flex AI Workout Trainer & Log4 screens
Gymijet4 screens

Verdict

The call

The clearest difference is review sentiment: Gymijet at 100% against Flex AI Workout Trainer & Log's 69%. Gymijet also leads on rating (5.0 vs 4.6). Flex AI Workout Trainer & Log's advantage is ratings volume (2.4K vs 2). On price, update cadence, ads and in-app purchases 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 Gymijet sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Gymijet 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 Gymijet's.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Gymijet every 3 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Flex AI Workout Trainer & Log versus Gymijet: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogGymijet
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 Watch — betteriPhone
Requires iOS18.018.0
Further details — not scored
Size574 MB90 MB
Age rating17+17+
DeveloperFlex Artificial Intelligence Inc.Gymijet 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%

Gymijet

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 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

Gymijet

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

Gymijet

Subscriptions2
  • Gymijet Full Access7 Days trial$9.991 Month
  • Gymijet Full Access7 Days trial$99.991 Year

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is Gymijet free?
Gymijet is free to download, with in-app purchases available.
Which has better reviews, Flex AI Workout Trainer & Log or Gymijet?
Gymijet is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while Gymijet averages 5.0 from 2 ratings.
Do Flex AI Workout Trainer & Log or Gymijet have ads?
Neither Flex AI Workout Trainer & Log nor Gymijet shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or Gymijet?
Flex AI Workout Trainer & Log ships an update every 9 days, and Gymijet every 3 weeks. Most recently, Flex AI Workout Trainer & Log was updated on October 29, 2026 and Gymijet on October 24, 2026.

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