OxyScore: VO2max & Fitness Age

Train your VO2max

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

Your VO2max is the fitness measure most linked to a longer life. Measure yours properly, see your real fitness age, and train it up with live wrist coaching. VO2max is the fitness measure most consistently linked to a longer, healthier life. OxyScore is built around that one number: measure it properly, see what it means for you, and train it up. MEASURE IT PROPERLY Three guided field tests — the Cooper test, the Rockport walk test, and an indoor max-effort protocol — turn one real effort into a measured VO2max reading. Each test shows its accuracy range and the published study behind it, right in the app. Verified tests plot alongside your passive estimates on one trend chart, so you always know which numbers you earned. SEE WHAT IT MEANS • Fitness age — the age your VO2max says you are, from the FRIEND clinical registry • Your percentile among people your age and sex • Your fitness category, grounded in a 122,007-person study (Mandsager 2018) • Heart Health tiles: heart-rate recovery, resting heart rate, HRV — each on its own evidence, never blended into a made-up score TRAIN IT UP — FROM YOUR WRIST Five research-backed protocols — Norwegian 4×4, VO2max 4×3, 10-20-30, Billat 30-30, and Zone 2 — coached live on Apple Watch with haptic cues, so you never have to look at a screen mid-interval. The coaching follows the physiology: a hard interval asks for at least 90% of your max heart rate with no ceiling — go harder and you're still in the zone, not nagged to slow down — and recovery only asks you to come down, because a heart rate that drops fast is exactly what you're training for. YOUR WEEK, PLANNED FOR YOU One adaptive weekly goal — hard sessions and easy Zone 2 minutes sized to your fitness, stepping up when you're ready and backing off when you're not. On supported iPhones, Apple Intelligence writes your plan and your post-workout analysis in plain sentences, grounded strictly in numbers the app verified. No hype, no invented stats. Rough week? A real deload — no guilt loops. WATCH IT COMPOUND Weekly streaks, 34 research-grounded achievements, a training level that only real work moves, and a monthly Longevity Report recapping what the month did to your number. PRIVATE BY DESIGN Your health data never leaves your devices. No accounts, no tracking, no third-party analytics. Everything computes on-device from Apple Health, and workouts save back to Apple Health. Your streak and weekly goals sync through your own iCloud so a new phone doesn't reset them; your health data never does. REQUIRES AN APPLE WATCH Guided sessions run on your wrist. The iPhone app shows your numbers without one, but OxyScore is built for the Watch. OxyScore Membership: $29.99/year or $4.99/month, Family Sharing included. Free trials — 14 days yearly, 1 week monthly — are for new subscribers, one per Apple ID; if you've used one before, subscribing charges the full price. Payment is charged at confirmation of purchase and renews automatically unless canceled at least 24 hours before the period ends; manage in Settings. OxyScore is a fitness app, not a medical device. It does not diagnose, treat, or prevent any condition. Consult your physician before beginning vigorous exercise. Terms: https://oxyscore.fit/terms · Privacy: https://oxyscore.fit/privacy

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The developer, KIRILL PUSTOVALOV, 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

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    Information

    Seller
    • KIRILL PUSTOVALOV
    Size
    • 4.9 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    • Apple Watch
      Requires watchOS 10.0 or later.
    Languages
    • English
    Age Rating
    18+
    In-App Purchases
    Yes
    • OxyScore Monthly $4.99
    • OxyScore Yearly $29.99
    • Learn More
    Copyright
    • © 2026 Kirill Pustovalov
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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