True VO2 Max — Cardio Fitness

VO2 Indoor & Lab-like Tracking

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

True VO2 Max gives you lab-like cardio fitness insights using your Apple Watch — now indoors too. Stop getting misleading VO₂ max drops from heat, humidity, altitude, smog, or tough outdoor conditions. We correct for real-world factors so you can trust your fitness trend. And with our first-of-its-kind Indoor Treadmill VO₂ Max, you can track cardio fitness even when you run inside. No account required. No ads. ▷ INDOOR TREADMILL VO₂ MAX - Estimate VO₂ max from indoor treadmill runs - Perfect for winter, rain, or night runs - See indoor fitness changes clearly — without outdoor weather noise ▷ CORRECTED VO₂, ANY WEATHER - Removes temperature, humidity, altitude, heat, cold, etc. - Raw vs Corrected shown side-by-side - Trust the trend, not the temperature ▷ SCIENCE-BACKED CORRECTIONS - Research-based penalties for weather & elevation - Transparent impact per condition - Spot real changes vs. bad weather ▷ IMPACT RESULTS - Automatic processing the moment you finish your workout - Be first to see your real fitness trend — no more confusion - See progress even when conditions make it look worse ▷ AUTOMATIONS - Apple Watch sync - Health app sync - VO2 corrections, no manual input needed ▷ WHAT'S FREE? - No ads - Unlimited runs/workouts - Corrected VO₂ max vs. weather - Raw Apple Watch VO₂ max vs. Corrected VO₂ max - Weather logging - Record your activities - Basic insights about your performance ▷ WHAT'S PLUS? - Indoor Treadmill Watch app - Instant weather capture as soon as you finish your workout - Most accurate VO2 max correction every time - Clear & transparent impact per weather condition - Improve your VO₂ max with Full Insights - Personalized performance takeaways - And more Try Plus free for 7 days. Cancel anytime. ▷ PRIVACY - No account needed - No tracking - No ads - No personal data collected - No third-party SDKs - All logged info (runs, corrected VO2 max, etc.) remains on-device Not a medical device. True VO2 Max is for fitness and wellness only. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

  • 3.7
    out of 5
    12 Ratings

Completely rebuilt workout syncing for faster, more reliable updates from Apple Health. Workouts now appear sooner while additional details continue syncing automatically. Improved post-workout summaries, including clearer handling of information that is still processing or unavailable. More reliable route, weather, heart-rate, and VO₂ max enrichment. Post-workout notifications are now available to everyone. Improved subscription purchasing and entitlement recognition. Safer workout-history migration, stronger data protection, and numerous performance and stability improvements. Stay tuned & rate us if you enjoy using True VO2 Max!

The developer, DANIEL BLACKBURN, 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer indicated that this app supports the following accessibility features. Learn More

    • Supported Features

      • Dark Interface

      • Differentiate Without Color Alone

      • Sufficient Contrast

    Seller
    • DANIEL BLACKBURN
    Size
    • 44.7 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    • Apple Watch
      Requires watchOS 10.6 or later.
    Languages
    • English
    Age Rating
    9+
    In-App Purchases
    Yes
    • Plus Monthly Subscription $5.99
    • Plus Yearly Subscription $59.99
    Copyright
    • © 2025 Daniel Blackburn