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VO2 Max Trainer: HIIT, Zone 2
PACER, Beep, Cooper Test, 4x4
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Boost your VO2 max, one of the strongest predictors of endurance performance and of how long and how well you live. Measure your true VO2 max in 15 minutes or less, raise it with Zone 2 and HIIT workouts, and beat the rest of the world on a verified global leaderboard. iPhone and Apple Watch.
NEW: GHOST RACE
Race a ghost during your Cooper test, Balke test or 1.5 mile (2.4 km) run. Pick your best run, your 12-week goal, the athlete 10 places above you on the leaderboard, the #1 of your age group, an Olympic record, or any VO2 max you choose. The gap shows live in meters or yards, green when you lead and orange when you chase, with voice cues when you pass or get passed. Follow the race on the Lock Screen, in the Dynamic Island and on your Apple Watch, even without your iPhone. The result saves as a normal test, and you can share a "Me vs ghost" card.
MEASURE YOUR VO2 MAX
- Beep test 20 m and 15 m (bleep test, PACER test, multistage fitness test, Leger shuttle run)
- Yo-Yo Intermittent Recovery test, levels 1 and 2 (YYIR1, YYIR2)
- Cooper test (12-minute run)
- Balke test (15-minute run)
- 1.5 mile / 2.4 km run test
Results are compared with age and sex norms.
FIND YOUR TRUE MAX HEART RATE AND LACTATE THRESHOLD
The 220 minus age formula can be off by 10 to 20 beats per minute. Run a beep test with a heart rate monitor and the app records your real maximum heart rate and estimates your lactate threshold from how your heart rate responds as the pace rises, with no lab and no blood test. Your Zone 2 and HIIT zones are then built from your own threshold.
TRAIN TO IMPROVE IT
- Zone 2 training with personal heart rate limits and Apple Watch haptics when you drift out of zone
- HIIT and interval workouts: Norwegian 4x4, Tabata, Gibala, 30/30, EMOM, Myoreps
- Free mode to log any session
- Custom workout builder: work, rest, repeat blocks, warm-up and cool-down
- A 12-week training plan built from your current fitness level
- An AI coach on the Plan tab that tells you what to do today and why
GLOBAL LEADERBOARD WITH VERIFIED RESULTS
Compare your VO2 max with athletes worldwide by age, sex, country and job. A score only reaches the leaderboard after anti-cheat checks: GPS, heart rate (Apple Watch or a chest strap), cadence and vehicle detection. Verification badges show how each result was checked.
O2 POINTS AND RANKS
VO2 max moves slowly, so O2 Points show the work you put in every day. Every minute with heart rate earns points, harder zones earn more, and 80/20 training, following your plan and retesting give boosts. Climb 7 ranks, from Reserve Duty to Norwegian Cyborg.
LIVE ACTIVITIES AND WIDGETS
Every test, Zone 2 session and interval workout shows on the Lock Screen and in the Dynamic Island: level, time, heart rate and zone without unlocking. Home Screen and Lock Screen widgets show your next workout, readiness, fitness age, VO2 max progress, Zone 2 minutes, O2 rank and leaderboard position.
KNOW YOUR BODY
- Training readiness score (1 to 100) from HRV, resting heart rate, sleep and recent load
- Fitness age, from your VO2 max and other health markers
- Race time predictions from 5K to marathon
- Post-workout analysis: effort score, time in each zone, pace, intervals
- Editable history with monthly and yearly charts
APPLE WATCH AND HEALTH
Leave the phone at home: tests, Zone 2 and intervals run on the watch with haptics and audio. Workouts sync with Apple Health, and workouts from other apps can be imported.
WHO IT'S FOR
Athletes and runners who want to go faster for longer. Soccer, rugby, basketball and hockey players. People preparing for military, police or firefighter fitness tests, PE teachers, students and coaches. And anyone who wants a stronger heart and lungs, a younger fitness age and more healthy years.
Built by one independent developer. Questions? Message me in the app.
Terms of use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ghost Race is here.
Run your Cooper test, Balke test or 1.5 mile run against a ghost: your best run, your 12-week goal, the athlete 10 places above you, the #1 of your age group, an Olympic record, or any VO2 max you pick.
- Tap RACE next to START RUN
- See the gap live, green when you lead, orange when you chase
- Voice cues and a flash when you pass or get passed
- Follow the race on the Lock Screen, Dynamic Island and Apple Watch, even without your iPhone
- Your result saves as a normal test, with the race on top. Race again, or share "Me vs ghost"
Built by one developer. If you like the update, a rating on the App Store helps a lot.
The developer, Kevin Floch, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- User Content
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Kevin Floch
- Size
- 299.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later. - Apple Watch
Requires watchOS 10.6 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
English and 37 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Marathi, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- VO2_Monthly $1.99
- VO2_Annually $29.99
- VO2_Lifetime2 $49.99
- VO2_Weekly $1.99
- VO2_Annually_Offer $14.99
- Medium tip $9.99
- Large tip $19.99
- Small tip $4.99
- Extra large tip $39.99
- VO2_Lifetime_Upgrade2 $24.99
- Copyright
- © Kevin Floc'h
