True VO2 Max — Cardio Fitness

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 ads - 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/