# True VO2 Max — Cardio Fitness — VO2 Indoor & Lab-like Tracking > Lab-like VO2 max tracking and correction for indoor and outdoor runs. (iPhone/iPad app by DANIEL BLACKBURN.) - Source: https://appshunter.io/ios/app/true-vo2-max-cardio-fitness/id6751441781 (this page in markdown: same URL + `.md`) - Developer: [DANIEL BLACKBURN](https://appshunter.io/developer/1835137703) - Category: Health & Fitness, Lifestyle - Price: Free with in-app purchases - Rating: 3.70/5 from 12 App Store ratings · 7 written reviews indexed - Age rating: 4+ - Requires: iOS 17.6 · 43 MB - Languages: American English - Released: 2025-10-22 - Data updated: 2026-08-24 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/true-vo2-max-cardio-fitness/id6751441781/reviews.md ## What is True VO2 Max? 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/ ## Key features - Indoor treadmill VO2 max estimation - Weather and altitude correction for VO2 max - Raw vs. corrected VO2 max comparison - Automatic workout processing - Apple Watch and Health app sync - No account or ads required ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Plus Monthly Subscription | $5.99 | per month | | Plus Yearly Subscription | $59.99 | per year | ## Recent user reviews (7 of 7) All indexed reviews: https://appshunter.io/ios/app/true-vo2-max-cardio-fitness/id6751441781/reviews.md ### 5/5 — Apple should buy this *2026-07-26* Great app. Very helpful. I was puzzled when Apple’s estimate of my VO₂ Max started going down despite no changes in my training plan. It occurred to me that this coincided with a heat wave but it seemed inconceivable that Apple would not factor that in. Wrong. This app convinced me that I was not doing anything wrong and now that the weather has cleared up, Apple’s estimate is catching up. Thanks to the developer for saving me from changing something that has been working. ### 3/5 — Nice app but needs better sync! *2026-07-19* I love the app when it works, but I often have trouble with it not reading recent outdoor runs or walks where there is indeed a VO2Max score. I use the same tracking method, Apple Watch Series 11, iPhone 17 Pro Max, tracked with the Fitness app every single time. Currently it only shows runs through early last week when I have had 3 outdoor runs since then. There is no refresh button, all permissions are granted, no changes made. **Developer response:** Hi Mark, thank you for the feedback! We just completely rebuilt workout syncing in our latest update to make importing runs and walks from Apple Health and the Fitness app faster and more reliable. If you still experience any issues, please email us directly at truevo2max@gmail.com and we will happily jump in to help! ### 1/5 — Not great *2026-05-29* The app doesn’t see indoor workouts even with a paid membership, it’s simple won’t take into account count your treadmill runs. This app should be free until everything is fixed and works as advertised. **Developer response:** Hi there, thank you for your feedback, and I am very sorry for the frustration. I want to sort this out as soon as possible for you. To track your treadmill runs correctly, please ensure the True VO2 Max app is installed directly on your Apple Watch. You will need to use our watch app to record your treadmill sessions instead of the native Apple Fitness app. If you are already doing this and it still is not working, please email us at truevo2max@gmail.com. To help us troubleshoot, please include your iPhone and Apple Watch models, along with screenshots of the Indoor Settings tab from the True VO2 Max app on your phone. We want to get this fixed for you right away. ### 5/5 — Love the app! *2026-04-17* It’s amazing that it factors in elevation and temperature during the run. Easy to use and set up! ### 3/5 — Wanted to love it, but … *2026-03-27* 03.27 update: Psst! Fahrenheit vs Celsius option, please // Original: … too rudimentary. (1) Out on a run; aborted 5 minutes in. Deleted it from Health; that deletion flowed thru to all but this & 1 other app. (2) That other app has the standard delete feature, so I could remove the related data point. This app does not. (3) No *list* presenting the *dated* VO2Max readings. Instead, a chart, so you’re forced to play Tap City (tap dot to get specifics), repeatedly, to pull that history. // Thankfully, I chose the monthly sub so I could inspect the entirety of the app. Result: canceled about 9 days in. Dev, great idea! Respectfully, you’ve missed too many basics. Please → tweak, polish, and indulge user testing. Then, you’d OWN the VO2Max space! (Still) Rooting for ya **Developer response:** Thank you for the thoughtful and candid feedback. You were absolutely right that these were important basics, and I took them seriously. In the latest update, we’ve addressed the issues you mentioned by adding session deletion, a dated list view of runs and VO₂ Max readings, and improvements to data handling and overall usability. We’ve also introduced several new features, including Indoor Treadmill VO₂ Max tracking, expanded chart views, and other quality-of-life improvements. We really appreciate you taking the time to share such constructive feedback, it helped us make the app better. ### 2/5 — Wanted to love it, but … *2026-01-23* … too rudimentary. (1) Was out on a run, but aborted 5 minutes in. Deleted it from Health; that deletion flowed thru to all but this & 1 other app. (2) That other app has the standard delete feature, so I could remove the related data point. This app does not. (3) No *list* presenting the *dated* VO2Max readings. Instead, a chart, so you’re forced to play Tap City (tap dot to get specifics), repeatedly, to pull that history. // Thankfully, I chose the monthly sub so I could inspect the entirety of the app. Result: canceled about 9 days in. Dev, great idea! Respectfully, you’ve missed too many basics. Please → tweak, polish, and indulge user testing. Then, you’d OWN the VO2Max space! Rooting for ya **Developer response:** Thank you for the thoughtful and candid feedback. You were absolutely right that these were important basics, and I took them seriously. In the latest update, we’ve addressed the issues you mentioned by adding session deletion, a dated list view of runs and VO₂ Max readings, and improvements to data handling and overall usability. We’ve also introduced several new features, including Indoor Treadmill VO₂ Max tracking, expanded chart views, and other quality-of-life improvements. We really appreciate you taking the time to share such constructive feedback, it helped us make the app better. ### 1/5 — Not sure what this does *2026-01-11* I’d love to try it, the concept sounds great. However…it doesn’t pull any data whatsoever. I’ve uninstalled, reinstalled, quadruple checked permissions. It simply doesn’t work. **Developer response:** I’m sorry it didn’t work for you. Please note that True VO2 Max only pulls outdoor runs recorded after the app is installed, and it initially relies on Apple Health’s Cardio Fitness (VO₂ max) value for each run. If Apple Health didn’t record VO₂ for that workout, there’s nothing for the app to normalize and display. Please confirm VO₂ exists in Health → Cardio Fitness → Show All Data at the time of your run. If it’s missing, updating to the latest watchOS commonly resolves the Apple Watch→Health VO₂ sync issue. Then do a new outdoor run long enough for a VO₂ estimate (e.g 10 mins), and verify Health → Cardio Fitness → Data Sources & Access has the True VO2 Max app enabled to read data and your Watch listed as a data source. If you’d like, email truevo2max@gmail.com and I’ll troubleshoot with you. ## Frequently asked questions about True VO2 Max ### Does True VO2 Max have ads? No, True VO2 Max is completely ad-free. The app explicitly states 'No ads' in its description, ensuring an uninterrupted user experience. ### What is the pricing for True VO2 Max? The app is free to download and use with basic features. An optional 'Plus' subscription is available for advanced features, costing $2.99 per month or $19.99 per year, both with a 7-day free trial. ### How accurate is True VO2 Max? The app aims for lab-like accuracy by correcting for environmental factors like temperature, humidity, and altitude. It provides both raw and corrected VO2 max readings for comparison. ### Can I use True VO2 Max without an account? Yes, True VO2 Max does not require an account. All logged information, including runs and corrected VO2 max data, remains on your device for privacy. ### What devices does True VO2 Max support? True VO2 Max is supported on both iPhone and Apple Watch, allowing for seamless data syncing and tracking. ### How often is True VO2 Max updated? The app was last updated on March 7, 2026, with version 2.0. This indicates a recent update and ongoing development. ### What are the benefits of the 'Plus' subscription? The 'Plus' subscription unlocks the Indoor Treadmill Watch app, instant weather capture, more accurate VO2 max correction, personalized performance takeaways, and other advanced insights. ### What is the age rating for True VO2 Max? True VO2 Max has an age rating of 4+, making it suitable for a wide range of users interested in fitness tracking. ## Version history (last 5 releases) ### 2.5 — 2026-08-02 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! ### 2.4 — 2026-07-26 The Indoor tab just received its biggest expansion yet! Explore a large catalog of fully guided treadmill workouts; including easy runs, tempo sessions, intervals, hills, and long runs. Designed for runners of all levels. Start a workout on your iPhone and follow along on Apple Watch with a dedicated new workout display, live guidance, and voice coaching from your iPhone. Guided workouts can also automatically produce a VO2 max estimate when enough high-quality workout data is available. We’ve redesigned the entire Indoor experience to be more useful, intuitive, and enjoyable. Stay tuned & rate us if you enjoy using True VO2 Max! ### 2.3 — 2026-07-04 Post-workout insights have been completely redesigned and upgraded. After a workout, you can now review a much richer breakdown of your performance, including Heart Rate, Heart Rate Recovery, splits, a map of your run, elevation and pace charts, and the ability to add photos to your workout summary. We’ve also polished the app’s layout across the home screen, readiness, VO₂ max, medals, charts, and workout summary views so everything feels cleaner, more responsive, and easier to read on different iPhone sizes. The workout effort screen has also been refined for a smoother post-workout flow. Stay tuned & rate us if you enjoy using True VO2 Max! ### 2.2 — 2026-06-16 This update introduces one of the biggest expansions yet to True VO2 Max, with Atlas leading the way alongside major improvements to treadmill running, effort tracking, and post-run insights. Introducing Atlas: - Atlas is a new global training intelligence feature built to help you understand where, when, and how conditions affect performance. It gives every city a detailed Runability Score, showing how suitable the current environment is for training. - Atlas also includes a Performance Wheel, breaking down the key factors that influence your run, including energy level, temperature, humidity, wind, and other major weather conditions. You can see the best times to exercise, compare conditions across cities, and explore how the global environment changes your training experience. - With Atlas, you can explore cities around the world, understand which locations are best or worst for training, and learn why. Whether a city has ideal cool weather, high humidity, intense heat, or strong winds, Atlas helps turn environmental data into clear, useful training insight. - Incline Support for Treadmill Runs:
treadmill runs now support incline, making indoor run tracking and VO2 max more accurate and complete. - Redesigned Treadmill Run Interface:
the treadmill run experience has been redesigned to feel cleaner, clearer, and easier to use during a workout. - Beautiful New Post-Run Summary:
the post-run summary has been refreshed with a polished new design, making your workout results easier to review and more motivating to look back on. - Effort Level Tracking:
you can now add an effort level to each run, giving you a better way to capture how the workout felt beyond pace, time, and distance. ### 2.1 — 2026-05-17 This update introduces True Run Readiness, a new daily score designed to help you understand when you’re ready to run, when to take it easy, and when your body may need more recovery. True Run Readiness brings together Recovery, Fatigue, and Fitness insights in one clear view, giving you a more complete picture of how prepared you are for today’s training. Also new in this update: - Outdoor Run on Apple Watch. Start and track corrected VO2 from outdoor runs directly from True VO2 Max on Apple Watch. - Redesigned Home screen with a clearer, more visual VO₂ Max card. - Medals and achievements to help keep you motivated. - New in-app guide to help you get more from True VO₂ Max. - Temperature and unit settings for a more personalized experience. Improvements and fixes: - Resolved a Health permissions loop between iPhone and Apple Watch. - Fixed duplicate outdoor entries after indoor treadmill runs. - Reduced duplicate workout-saved notifications. Thank you for using True VO₂ Max. This update makes the app clearer, smarter, and more motivating - with a stronger focus on helping you understand your body before every run. ## Apps similar to True VO2 Max | App | Rating | Price | Category | | --- | --- | --- | --- | | [VO2 Max Pro: Track Fitness Age](https://appshunter.io/ios/app/vo2-max-pro-track-fitness-age/id6740225781) | 4.7 (32) | Free | Health & Fitness | | [Cardiolytics: VO2 Max Health](https://appshunter.io/ios/app/cardiolytics-vo2-max-health/id6749484835) | 4.1 (17) | Free | Health & Fitness | | [VO2Max Training](https://appshunter.io/ios/app/vo2max-training/id6751254440) | 4.5 (8) | Free | Health & Fitness | | [Training Load & Recovery](https://appshunter.io/ios/app/training-load-and-recovery/id6741155891) | 4.8 (6) | Free | Health & Fitness | | [VO2 max Hero - AI Tracker](https://appshunter.io/ios/app/vo2-max-hero-ai-tracker/id6745514867) | 1.0 (1) | Free | Health & Fitness | | [VO2 Max Calculator & Training](https://appshunter.io/ios/app/vo2-max-calculator-and-training/id6755130154) | — | Free | Health & Fitness | ## Related topics [vo2 max pro](https://appshunter.io/ios/topics/vo2-max-pro) · [vo2max training](https://appshunter.io/ios/topics/vo2max-training) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*