Comparison

WatchFit 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

WatchFit

Create and schedule custom workouts directly on your Apple Watch. Tailor intervals, warm-ups, and cool-downs with time or distance-based steps. Receive real-time alerts for pace and heart rate to optimize your training.

Highlights
  • Custom workout creation
  • Apple Watch integration
  • Interval and phase customization
  • Time and distance-based steps
  • Heart rate and pace alerts
  • Calendar integration
  • No account required
Features
Read full description

WatchFit is the ultimate fitness workout companion designed specifically for Apple Watch users who want to take their exercise routines to the next level. This app empowers you to create custom structured workouts tailored to your exact needs and seamlessly integrates them into the native Workout app on your Apple Watch, offering a smooth and personalized training experience. With WatchFit, building your perfect workout schedule has never been easier. You can customize every element of your training with detailed control over warmup, cooldown, and interval phases. Whether your workout steps are based on time or distance, WatchFit supports them all. For endurance sports such as running and cycling, it even offers distance-based step options, enhancing your precision and control in each session. You can plan your fitness routine ahead of time and watch as scheduled workouts automatically sync to your Apple Watch. Once added, these customized workouts appear right on the Workout app on your Apple Watch's home screen, ready to be started at the perfect moment, helping you stay accountable and motivated. One of the standout features of WatchFit is its advanced heart rate monitor integration and in-workout alert system. You can set up pace or heart rate alerts that notify you if you stray above or below your target zones during exercise. This real-time feedback keeps you in your ideal training intensity, ensuring every workout is optimized for maximum benefit. Managing your weekly fitness workout schedule is streamlined through an intuitive interface that lets you view your upcoming workouts, track completed sessions, and identify any missed ones. This visibility promotes consistency and helps reinforce your training habits. Plus, with calendar integration, your scheduled workouts are automatically added to your calendar app, so you never accidentally skip an important session. Privacy and security are paramount in WatchFit’s design. Unlike many fitness apps, WatchFit requires no account setup, and purchases are handled anonymously. Your custom workouts sync securely to your iCloud account, ensuring your data stays private and intact even if you switch devices or reinstall the app. WatchFit doesn’t gather user analytics or access personal workout data beyond verifying if workouts were completed, giving you full confidence in your privacy. Whether you're a seasoned athlete or just starting your fitness journey, WatchFit equips you with the tools to create personalized workouts that match your unique goals. By adding your workouts directly to the Apple Watch native Workout app, you reduce distractions and streamline your fitness experience, allowing you to focus fully on performance and progress. With its user-friendly scheduling, structured workout routines, heart rate alerts, and seamless Apple Watch integration, WatchFit is much more than a simple fitness workout app—it’s an intelligent fitness partner that supports your active lifestyle with precision and privacy. Maximize your training, stay committed to your goals, and enjoy the empowerment of having all your workouts perfectly organized on your Apple Watch home screen. Note: For the best experience, WatchFit is optimized for Apple Watch devices running watchOS 10 or later, paired with an iPhone. Terms & Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://sites.google.com/view/watchfit-privacy-policy"

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

WatchFit4 screens
VO2 Max Trainer4 screens

Verdict

The call

The clearest difference is review sentiment: WatchFit at 82% against VO2 Max Trainer's 0%. WatchFit also leads on rating (4.9 vs 3.0) and ratings volume (34 vs 2). VO2 Max Trainer's advantage is update cadence (weekly vs every 3 weeks) and device support (3 vs 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. WatchFit sells 5 in-app purchases, starting at $1.99 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

WatchFit holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: WatchFit has 34 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 82% of WatchFit's written reviews are positive against 0% of VO2 Max Trainer's.

UpkeepUpdate frequency

WatchFit ships an update every 3 weeks, VO2 Max Trainer weekly. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

Scorecard5 real differences · 5 level
WatchFit versus VO2 Max Trainer: the parameters behind the verdict, then further details
ParameterWatchFitVO2 Max Trainer
PriceFreeFree
Rating4.9 (34 ratings) — better3.0 (2 ratings)
Positive reviews81.8% of reviews — better0.0% of reviews
Number of ratings34 — better2
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.0 — better17.6
Further details — not scored
Size17 MB81 MB
Age rating4+4+
DeveloperMathieu SavariaKevin Floch

Customer experience

WatchFit

All ratings34 ratings
Positive97.1%
Neutral2.9%
Negative0.0%
Written reviews11 reviews
Positive81.8%
Neutral9.1%
Negative9.1%

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

WatchFit

Subscriptions2
  • WatchFit Premium$1.991 Month
  • WatchFit Premium3 Days trial$9.991 Year
One-time3
  • WatchFit Premium (Special)Free
  • WatchFit Premium (Sale)$9.99
  • WatchFit Premium (Lifetime)$19.99
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 WatchFit free?
WatchFit 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, WatchFit or VO2 Max Trainer?
WatchFit is rated higher. WatchFit averages 4.9 out of 5 from 34 ratings, while VO2 Max Trainer averages 3.0 from 2 ratings.
Do WatchFit or VO2 Max Trainer have ads?
Neither WatchFit nor VO2 Max Trainer shows ads.
Which is updated more often, WatchFit or VO2 Max Trainer?
WatchFit ships an update every 3 weeks, and VO2 Max Trainer weekly. Most recently, WatchFit was updated on September 15, 2026 and VO2 Max Trainer on September 10, 2026.

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