Need help with True VO2 Max? Find answers below or email [email protected].

Getting started

True VO2 Max uses Apple Health information to provide workout summaries and fitness insights. No account is required.

The current version requires iOS 17.6 or later. The companion Watch app requires watchOS 10.6 or later.

After installing:

1. Open True VO2 Max on your iPhone and complete setup.
2. Allow access to the Health categories needed for the features you want to use.
3. Allow Location access if you want conditions for your current location. Supported environmental features also let you choose a location manually.

For indoor treadmill features, open the Indoor tab and follow the setup instructions.

Understanding your VO₂ max

What is the difference between Raw and Corrected?

Raw is the VO₂ max estimate recorded by Apple Watch in Apple Health.

Corrected applies the app’s environmental adjustments to help you interpret that estimate alongside workout conditions.

Both are estimates. A corrected value is not a laboratory measurement or a guarantee of your exact fitness level. Look at trends across several comparable workouts rather than a single result.

Which workouts produce a VO₂ max estimate?

Apple Watch estimates outdoor cardio fitness during eligible Outdoor Walk, Outdoor Run, and Hiking workouts recorded with Apple’s Workout app. Not every workout produces a new reading. Apple’s cardio fitness guide

True VO2 Max also provides its own estimates for supported indoor treadmill runs with Plus.

Recording another activity, such as cycling or rowing, does not mean the app will calculate a VO₂ max estimate for it.

How do I get an indoor treadmill estimate?

With Plus, record an Indoor Run using True VO2 Max or Apple’s Workout app on your Apple Watch.