VO2 Maximizer, in plain facts.
IN ONE PARAGRAPH
VO2 Maximizer (App Store name “VO2 Max Trainer: HIIT, Zone 2”) is an iPhone, iPad and Apple Watch app to estimate and improve VO2 max. It runs five field tests (Beep, Yo-Yo, Cooper, Balke, 2.4 km / 1.5 mile) with norms by age and sex, guides Zone 2 and HIIT workouts, builds a 12-week plan with an AI coach and ranks results on a global leaderboard. It is free to download with in-app purchases.
Key facts
- App name (App Store)
- VO2 Max Trainer: HIIT, Zone 2 — “Bleep, Beep, Cooper, Yoyo Test”
- Also known as
- VO2 Maximizer
- Made by
- Kevin Floc'h (independent developer)
- Platforms
- iPhone, iPad and Apple Watch. The Apple Watch app works without the iPhone during a session.
- Price
- Free to download, with in-app purchases. Prices vary by country and are shown by the App Store.
- Languages
- 38 languages
- App Store
- https://apps.apple.com/app/vo2-max-trainer-hiit-zone-2/id6736629740
- Website
- https://www.vo2maximizer.com/
VO2 max field tests
- Beep test (20 m multistage shuttle run) and a 15 m version
- Yo-Yo intermittent recovery tests IR1 and IR2
- Cooper 12-minute run
- Balke 15-minute run
- 2.4 km / 1.5 mile run
- Norms by age and sex for every result
- Real maximum heart rate and lactate threshold from a beep test recorded with heart rate
Training
- Zone 2 training with haptic alerts when heart rate drifts out of the target zone
- HIIT presets: Norwegian 4x4, Tabata, Gibala, 30/30, EMOM, Myoreps; a free mode and a custom interval builder
- Ghost Race: run against your best run, a rival, a target VO2 max or Olympic record pace
- 12-week training plan with an AI coach
Insights
- Daily readiness score from 1 to 100
- Fitness age
- Race time predictions from 5K to marathon
- Heart rate zones, effort and training history
- Apple Health sync
Community and motivation
- Global leaderboard filtered by age, sex, country and job
- Anti-cheat checks on leaderboard scores (GPS, heart rate, cadence and vehicle detection)
- O2 Points with 7 ranks
System integration
- Live Activities and Dynamic Island
- Home Screen widgets
- Apple Watch app that runs tests and workouts on its own
Test guides and calculators
- Beep test (20 m multistage shuttle run) — calculator
- Cooper 12-minute run test — calculator
- Yo-Yo intermittent recovery test (IR1 and IR2) — calculator
- Balke 15-minute run test — calculator
- 2.4 km / 1.5 mile run test — calculator
What users say
Two App Store reviews, quoted exactly:
- “I've been using this app for 2 years, including as a beta tester, and the progress has been huge.” — VO2 max enjoyer, 5 stars, “Best VO2 max trainer out there”
- “Most complete app regarding Vo2 max training. Very nice Apple Watch app too.” — Stop The Milking, 5 stars, “Vo2 max powerhouse”
Accuracy
Field tests estimate VO2 max from running performance using published equations (stated on each test page). They do not replace a laboratory measurement of oxygen consumption, and the app is not a medical device.
Contact and support
See the support page and the privacy policy.