Comparison

AI Rep Counter vs VO2 Max Trainer

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

Head to head
About

AI Rep Counter

Generate personalized AI training programs or choose from a library of routines. Log workouts with automatic rep counting and track progress with smart charts and widgets. Integrates with Apple Watch and Siri for seamless fitness tracking.

Highlights
  • AI Training Programs
  • Routine Creation Wizard
  • Automatic Rep Counting
  • Smart Charts & Widgets
  • Apple Watch & Siri Integration
  • Body Metric Tracking
Features
Read full description

Your AI Workout Partner — Built for Every Lifter. HealthBuddy is the only workout tracker with on-device AI rep counting via AirPods, smart multi-week training plans, full nutrition logging with camera food scanning, and 18 body metrics — all in one premium experience for iPhone and Apple Watch. From your first squat to your next PR, train smarter, eat smarter, and see real results. ▸ AI REP COUNTING Strap on your AirPods and let HealthBuddy count for you. Our on-device motion model detects and counts reps in real time — so you can focus on form, not numbers. Constantly improving with every update. ▸ NUTRITION TRACKING Log meals effortlessly — scan food with your camera, describe a meal in words and let AI estimate the macros, or add it manually. Track calories, protein, carbs, and fats with clean daily summaries and macro progress that reflects how you train. ▸ WATER & SUPPLEMENT TRACKING Hit your daily water goals and never miss a dose. Quick-log hydration, creatine, protein, vitamins, and the rest of your stack to build consistent habits. ▸ AI TRAINING PROGRAMS Tell us your goal, level, equipment, and schedule — HealthBuddy generates a multi-week program with progression phases: Foundation, Intensify, Peak, Deload. Now with smarter support for women's training, including glute-focused and balanced programs. ▸ ROUTINE BUILDER Create custom routines with the guided Routine Wizard, or build them manually from our extensive exercise library. Filter by body part, equipment, and category. Add your own exercises with images. ▸ PRECISION WORKOUT LOGGING Log every set with intent — Warm-up, Working, Drop Set, and Failure sets. Track weight, reps, duration, or distance per exercise. Personal Records detected automatically. ▸ EFFORT TRACKING & MUSCLE MAP After your last working set, HealthBuddy asks how it felt — in words, reps in reserve, or RPE. The answer adjusts the load for your remaining sets, drives progression on adaptive routines, and sharpens your 1RM. Each session also lights up the muscles you worked. ▸ BODY MEASUREMENTS Track 18 body metrics including weight, body fat, chest, waist, biceps, and more. See trends over time and sync seamlessly with Apple Health. ▸ COMPOSABLE CHART WIDGETS Build your own analytics dashboard with line and column charts. Visualize workout volume, strength trends, body composition, and PR progression. Drag and reorder freely. ▸ APPLE WATCH COMPANION Your full workout experience on your wrist. Browse routines, log sets, and track heart rate — all without pulling out your phone. Real-time sync keeps everything in lockstep. ▸ HOME & LOCK SCREEN WIDGETS Live Activity and Dynamic Island for active workouts. Home Screen widgets for streaks, today's program, weekly activity, PR spotlights, nutrition (calories, macros, water, supplements), and quick-start. ▸ SIRI & SHORTCUTS Start workouts, log sets, and check progress with your voice. Deep Shortcuts integration for custom automations. ▸ APPLE HEALTH SYNC Two-way sync. Workouts, measurements, and activity flow seamlessly between HealthBuddy and the Health app. ________________ WHY HEALTHBUDDY • On-device AI — your motion data never leaves your phone • Apple-native: Watch, Live Activity, Widgets, Siri, Health Sync — all working together • Built and refined by lifters who actually train • Send feedback from inside the app — we read every message and ship fast ________________ WHO IS HEALTHBUDDY FOR? • Lifters who want detailed set-by-set tracking with automatic PR detection • Program followers who need structured, progressive training plans • Women who want plans designed around their goals • Nutrition-conscious athletes tracking meals alongside workouts ________________ TRAIN SMARTER. EAT SMARTER. TRACK EVERYTHING. SEE RESULTS. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

VO2 Max Trainer

Measure, track, and improve your VO2 Max with a variety of fitness tests and personalized training plans. Features include HIIT and Zone 2 workouts, progress tracking, and integration with Apple Watch and HealthKit.

Highlights
  • Measure VO2 Max with 5 fitness tests
  • HIIT and Zone 2 training
  • Track progress and compare to leaderboards
  • Apple Watch integration
  • HealthKit integration
  • Training readiness scoring
  • Fitness age calculation
Features
Read full description

VO2 MAXimizer: Take your fitness to the next level with this VO2 Max Trainer app, your all-in-one solution to measure, track, & improve Your VO2 Max. Whether you're an athlete, or fitness enthusiast with this VO2 MAXimizer app you can: - Accurately measure your cardiovascular fitness and VO₂ max with 5 internationally recognized fitness tests: Beep Test (20m & 15m), YoYo Test (YYIR1 + YYIR2), Cooper Tests, Balke Test & 1.5 miles/2.4km Test. - Challenge yourself with different HIIT trainings (for example tabata, 4x4 nordic, gibala, or you can create your own fully customized HIIT) - Improve your VO2 Max and burn fat with Zone 2 training - Track your progress and compare yourself to benchmarks or a global leaderboard. All of that, both on your iPhone and on your Apple Watch. PROFESSIONAL FITNESS TESTING IN YOUR POCKET: Experience the precision of lab-grade fitness assessment right on your iPhone and Apple Watch with the Beep Test, Yo-Yo Test, Cooper Test, Balke Test & 1.5 miles/2.4km Test SEAMLESS APPLE WATCH EXPERIENCE Leave your iPhone behind - your Apple Watch provides perfect timing through haptic feedback and audio cues. Monitor your heart rate in real-time and sync all your results automatically across devices. TRACK YOUR JOURNEY Every test and workouts is automatically saved. Watch your VO₂ max improve, track your distance gains, and see how you measure up against others in your age group. With HealthKit integration, your fitness data seamlessly integrates into your overall health picture. MADE FOR ATHLETES & FITNESS ENTHUSIASTS From the audio cues to the crystal-clear visuals, every detail is designed to help you perform at your best. Track your progress with beautiful charts, compare your results to international standards and to other athletes, and watch your fitness level improve over time. What's New in V4: -Training readiness scoring: combines your HRV, RHR, sleep, and recent load into a daily 1-100 score. Tells you when to push vs. when to back off. - Fitness age: calculates your cardiovascular age from VO2 max + lifestyle factors. - Better workout analysis: effort scores, zone breakdowns, pace analysis. Actually useful post-run data. - Race predictions: gives you projected times for 5K through marathon based on your current fitness. - Watch app redesign: rebuilt from scratch. Better screens during tests, cleaner metrics display. - 3 months training plan, tailored to your current fitness level, in order to boost your Vo2 Max. - Personalized Zone 2 heart rate guidance, based on your VO2 Max results, not generic heart rate zones based on your max heart rate. With your Apple Watch, get real-time haptics when you're in or out of Zone 2. Zone 2 (fat burning) training. - Support for external heart rate monitor (garmin, polar etc.). Other features: - Global Leaderboard Compete with verified scores users worldwide! Only 20m Beep Test scores with GPS and heart rate validation (with an apple watch or an external heart rate monitor) make it to the leaderboard. Compare your performance within your age group and gender, with built-in anti-cheat protection ensuring fair competition. - Interval Workouts/HIIT New HIIT and interval training with pre-designed templates (tabata, 4x4 nordic etc.) or create your own custom workouts. Track intensity time and heart rate data on both iPhone and Apple Watch with built-in timers and progression tracking. - Enhanced Progression Tracking Analytics with separate tracking for tests vs. workouts. View your fitness journey through monthly and yearly progress charts. All the tests and workouts covered: - Beep test 20m & 15m (also called Bleep test, PACER, shuttle run test) - Cooper Test - Yoyo Test (YYIR1 & YYIR2) - Balke Test - 1.5 miles / 2.4km test - 4x4 nordic - Tabata - 30/30- EMOM 15 min- Gibala - Zone 2 fat burning training This app is licensed under the standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

AI Rep Counter4 screens
VO2 Max Trainer4 screens

Verdict

The call

The clearest difference is review sentiment: AI Rep Counter at 50% against VO2 Max Trainer's 0%. AI Rep Counter also leads on rating (5.0 vs 3.0) and ratings volume (38 vs 2). VO2 Max Trainer's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (17.6 vs 26.1). 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. AI Rep Counter sells 5 in-app purchases, starting at $0.99 per month and VO2 Max Trainer sells 7 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

AI Rep Counter holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: AI Rep Counter has 38 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of AI Rep Counter's written reviews are positive against 0% of VO2 Max Trainer's.

UpkeepUpdate frequency

AI Rep Counter ships an update every 3 weeks, VO2 Max Trainer weekly. The most recent releases landed on September 20, 2026 and September 10, 2026 respectively.

Scorecard5 real differences · 5 level
AI Rep Counter versus VO2 Max Trainer: the parameters behind the verdict, then further details
ParameterAI Rep CounterVO2 Max Trainer
PriceFreeFree
Rating5.0 (38 ratings) — better3.0 (2 ratings)
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings38 — better2
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS26.117.6 — better
Further details — not scored
Size133 MB81 MB
Age rating4+4+
DeveloperBartlomiej Zabicki Mobile DeveloperKevin Floch

Customer experience

AI Rep Counter

All ratings38 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

VO2 Max Trainer

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

5 purchases

AI Rep Counter

Subscriptions4
  • Premium7 Days trial$0.991 Month
  • Premium$0.997 Days
  • Premium7 Days trial$1.993 Months
Show 1 more
  • Premium1 Month trial$5.991 Year
One-time1
  • Tip the developer$1.99
7 purchases

VO2 Max Trainer

Subscriptions3
  • VO2_Weekly3 Days trial$1.997 Days
  • VO2_Monthly7 Days trial$1.991 Month
  • VO2_Annually7 Days trial$14.991 Year
One-time4
  • VO2_Lifetime_Upgrade$9.99
  • VO2_Lifetime_Upgrade2$14.99
  • VO2_Lifetime$19.99
Show 1 more
  • VO2_Lifetime2$29.99

Questions

Is AI Rep Counter free?
AI Rep Counter is free to download, with in-app purchases available.
Is VO2 Max Trainer free?
VO2 Max Trainer is free to download, with in-app purchases available.
Which has better reviews, AI Rep Counter or VO2 Max Trainer?
AI Rep Counter is rated higher. AI Rep Counter averages 5.0 out of 5 from 38 ratings, while VO2 Max Trainer averages 3.0 from 2 ratings.
Do AI Rep Counter or VO2 Max Trainer have ads?
Neither AI Rep Counter nor VO2 Max Trainer shows ads.
Which is updated more often, AI Rep Counter or VO2 Max Trainer?
AI Rep Counter ships an update every 3 weeks, and VO2 Max Trainer weekly. Most recently, AI Rep Counter was updated on September 20, 2026 and VO2 Max Trainer on September 10, 2026.

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