MAJOR UPDATE
The Theme Store is open
Pick a Look, or mix your own: backdrops, pass skins, stickers and icons. Ultra unlocks them all, once.
Supported Features
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VoiceOver
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Differentiate Without Color Alone
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Sufficient Contrast
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Reduced Motion
VO2 Max Pro: Track Fitness Age
Cardio Health, Longevity Stats
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
New in 2.0: no VO₂ Max yet? Send a 20-minute walk straight to your smart watch and pick a time. We'll tell you when your reading is in.
Find your Fitness Age: how old your heart and lungs perform, based on your VO2 max from Apple Health.
VO2 Max Pro turns the Cardio Fitness readings your Apple Watch already records into a number that's easy to understand, then shows how it's changing and where you stand among people your age.
WHAT YOU GET
• Fitness Age: see how many years younger (or older) your fitness makes you
• Trends: follow your VO2 max over the past week, month, and year
• Where you stand: compare with others of your age and sex
• Check-In: press the Action button or ask Siri to see your numbers and log a reading, without opening the app
• Widgets: your Fitness Age and VO2 max trend on your Home Screen and Lock Screen
• Fitness Pass: a shareable card with your Fitness Age, VO2 max, and rank
• Lab results: log a VO2 max from a lab or treadmill test and save it to Apple Health
• Instant updates: get notified as soon as a new reading arrives
WORKS WITH APPLE HEALTH
VO2 Max Pro reads your Cardio Fitness, age, and sex from Apple Health, and saves readings you log back to it. Your health data stays on your iPhone.
Whether you're training for a race, working on your heart health, or just curious, VO2 Max Pro shows you where your fitness is heading.
MAKE IT YOURS
Open the Theme Store from Profile to restyle the app. Pick a Look to change Home, your Fitness Pass and your app icon in one tap, or mix backdrops, pass skins, stickers and icons yourself. Some themes are free. Ultra is a one-time purchase that unlocks every Ultra theme, including ones added later. No subscription, and it works with Family Sharing.
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VO2 Max Pro is for general fitness and wellness. It is not a medical device and does not provide medical advice.
Events
Your first VO₂ Max is one walk away.
• No reading yet? Send a 20-minute outdoor walk straight to your smart watch, and pick when to take it
• A Live Activity appears an hour before, then shows you where to start it when it's time
• Home keeps track of your walk: change the time, cancel it, or see how to start it
• A brand new onboarding built around your own VO₂ Max history
• New reading notifications are more accurate, with how much you changed
The developer, Xipu Li, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Contact Info
- Identifiers
- Usage Data
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Xipu Li
- Size
- 144.5 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.4 or later.
- iPhone
Requires iOS 17.4 or later. - Mac
Requires macOS 14.4 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.1 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Ultra $9.99
- Copyright
- © 2026 Xipu Li