VO2Stats: VO2 Max Calculator
Aerobic Fitness & Running Test
Only for iPhone
$0.99 · Designed for iPhone. Not verified for macOS.
iPhone
Track your aerobic fitness with 9 peer-reviewed algorithms. Charts, history, and age-adjusted categories — all from your Apple Health data.
VO2Stats calculates your VO2 max using nine peer-reviewed scientific methods - giving you a richer, more complete picture of your aerobic fitness than any single estimate can provide.
-- NINE METHODS --
Jack Daniels VDOT - converts your running pace and distance into a VDOT fitness score, the gold standard used by coaches worldwide.
Submaximal HR (Firstbeat-style) - models the relationship between heart rate and running speed, extrapolated to your maximum.
Uth-Sorensen - uses the ratio of your maximum to resting heart rate. Simple and effective for trend tracking.
Rockport Walk Test - ideal for lower-fitness individuals; based on a 1-mile walk and end heart rate.
Cooper 12-Min Run - estimates VO2 max from how far you can run in 12 minutes.
Non-Exercise / Wier - requires no workout; uses age, body metrics, and daily activity data.
HR Recovery - faster heart rate recovery after exercise correlates strongly with higher VO2 max.
Astrand-Rhyming (Cycling) - submaximal cycling test using power output and steady-state heart rate, with age correction.
Coggan FTP (Cycling) - derives VO2 max from your best 20-minute cycling power, normalized to body weight.
-- FEATURES --
Dashboard - see your best current estimate with confidence rating, plus a summary of all active methods at a glance.
History - track how your VO2 max has changed over 3 months, 6 months, 1 year, 2 years, or all time. Fitness categories adjust for your age at each point in time, so improving thresholds are always compared fairly.
Compare - plot all nine methods on one chart to see how they align. A spread indicator tells you when methods agree.
Methods Guide - a full reference explaining each algorithm, its scientific source, the data it needs, and its limitations. Fitness categories are personalized to your age and sex from Apple Health.
Confidence indicators - each estimate shows a signal-strength badge (Rough / Fair / Reliable) based on the quality and quantity of data available.
-- PRIVATE BY DESIGN --
All calculations run entirely on your iPhone. VO2Stats reads from Apple Health and never writes to it. No account required. No cloud sync. No advertising. No analytics. Your health data never leaves your device.
-- IMPORTANT --
VO2Stats is a fitness and wellness tool for informational purposes only. It is not a medical device and is not intended to diagnose, treat, or replace clinical VO2 max testing. Accuracy varies based on available data, individual physiology, and workout conditions. Consult a healthcare professional before making health decisions based on any fitness metric.
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The developer, Bramhand Consultancy Services Inc., 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Bramhand Consultancy Services Inc.
- Size
- 992.3 KB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © Bramhand Inc.
