Comparison

BattleFit vs Flex AI Workout Trainer & Log

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

Head to head
About

BattleFit

Challenge friends and family to fun, quick workouts to achieve fitness goals. Compete with others globally or train solo to improve personal bests and climb leaderboards. Offers a wide variety of pre-loaded and customizable workouts for all fitness levels.

Highlights
  • Challenge friends and family
  • Battle yourself for personal bests
  • Track progress and view results
  • Create custom workouts
  • Climb leaderboards
  • Level-up by winning battles
Features
Read full description

Challenge your friends with workouts that are quick, fun, challenging and best of all help motivate you to reach your fitness goals. No matter where you are located, you will find someone who will be willing to workout with you. BattleFit is great for fitness, weight loss, training, getting active, getting motivated and the best part about it, its social. You can now workout with friends, family or any BattleFit user without having to be in the same town, city, country or even timezone. BattleFit is not only for fitness fanatics. It caters for all fitness levels, whether you are a female looking to lose weight or tone up, guys who are looking to get fitter for sports, bulk up, or get cut. The workouts pre-loaded in BattleFit range from Easy, for people starting out through to Hard, for the more seasoned BattleFit users. BattleFit is working out with a twist. It is based on challenging one or more players at any type of workout you wish. We preload the app with 100+ pre-defined workouts, however it is not limited to just these workouts. We give you the ability to create your own workouts so that you don't feel held back by what we have to offer. You can also battle yourself at any workout to improve your personal best , or train under the radar until you are ready to battle someone online. Keep track of your progress as well as climb the leaderboard to the top of the BattleFit world. Features: - Challenge your friends and family at any workout. - Battle yourself to improve your personal best or to train under the radar before battling the BattleFit community - Track your progress and view your past results and compare - Send nudges to your BattleFit friends to motivate them - Invite your friends from Facebook to join you in the journey of getting Fit and healthy. - Level-up by winning battles and earning BattleFit Points - Climb the Leaderboard to the top of the BattleFit world - Easy to use User interface - Create any type of workout - Share your results on Facebook For our terms of use, please visit https://battlefitapp.com/terms-of-use/

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.

Screenshots

BattleFit4 screens
Flex AI Workout Trainer & Log4 screens

Verdict

The call

The clearest difference is rating: Flex AI Workout Trainer & Log at 4.6 against BattleFit's 1.5. Flex AI Workout Trainer & Log also leads on ads (none vs shown) and ratings volume (2.4K vs 2). BattleFit's advantage is review sentiment (82% vs 69%) and iOS requirement (15.0 vs 18.0). On price, in-app purchases, monetization model 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. BattleFit sells 10 in-app purchases, starting at $2.99 per month and Flex AI Workout Trainer & Log sells 8 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

Flex AI Workout Trainer & Log holds the better App Store score, 4.6 against 1.5. 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 complicate that: 82% of BattleFit's written reviews are positive against 69% of Flex AI Workout Trainer & Log's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

BattleFit ships an update monthly, Flex AI Workout Trainer & Log every 9 days. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
BattleFit versus Flex AI Workout Trainer & Log: the parameters behind the verdict, then further details
ParameterBattleFitFlex AI Workout Trainer & Log
PriceFreeFree
Rating1.5 (2 ratings)4.6 (2.4K ratings) — better
Positive reviews81.8% of reviews — better69.3% of reviews
Number of ratings22.4K — better
Update frequencyMonthlyEvery 9 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.0 — better18.0
Further details — not scored
Size81 MB574 MB
Age rating4+17+
DeveloperDU3 Pty LtdFlex Artificial Intelligence Inc.

Customer experience

BattleFit

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews11 reviews
Positive81.8%
Neutral0.0%
Negative18.2%

Flex AI Workout Trainer & Log

All ratings2,405 ratings
Positive92.0%
Neutral2.6%
Negative5.4%
Written reviews303 reviews
Positive69.3%
Neutral6.6%
Negative24.1%

Bugs and requests

BattleFit

Not enough reviews yet to summarise bugs or 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

In-app purchases

10 purchases

BattleFit

Subscriptions2
  • MVP Monthly Access7 Days trial$2.991 Month
  • MVP Annual Pass$39.991 Year
One-time8
  • Recharge 50 FitCreds$2.99
  • Unlock Battles+$2.99
  • Unlock Workouts+$2.99
Show 5 more
  • BattleFit Upgrade$4.99
  • Recharge 100 FitCreds$4.99
  • Unlock Programs+$4.99
  • Recharge 250 FitCreds$9.99
  • Unlock BattleFit+$9.99
8 purchases

Flex AI Workout Trainer & Log

Subscriptions6
  • Premium Subscription Monthly$1.991 Month
  • Premium Plus Monthly$2.991 Month
  • Premium Yearly Subscription$9.991 Year
Show 3 more
  • Premium Plus Family Monthly$9.991 Month
  • Premium Plus Yearly7 Days trial$19.991 Year
  • Premium Plus Family Yearly7 Days trial$49.991 Year
One-time2
  • 1 Month Free PremiumFree
  • Lifetime Free PremiumFree

Questions

Is BattleFit free?
BattleFit is free to download, with in-app purchases available.
Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Which has better reviews, BattleFit or Flex AI Workout Trainer & Log?
Flex AI Workout Trainer & Log is rated higher. BattleFit averages 1.5 out of 5 from 2 ratings, while Flex AI Workout Trainer & Log averages 4.6 from 2.4K ratings.
Do BattleFit or Flex AI Workout Trainer & Log have ads?
BattleFit shows ads; Flex AI Workout Trainer & Log does not.
Which is updated more often, BattleFit or Flex AI Workout Trainer & Log?
BattleFit ships an update monthly, and Flex AI Workout Trainer & Log every 9 days. Most recently, BattleFit was updated on September 9, 2026 and Flex AI Workout Trainer & Log on September 23, 2026.

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