True VO2 Max — Cardio Fitness

True VO2 Max — Cardio Fitness

Indoor & Lab-like Vo2 Tracking

8 ratings
5 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 22, 2025
  • June 16, 2026

Features

True VO2 Max — Cardio Fitness screenshot #1 for iPhone
True VO2 Max — Cardio Fitness screenshot #2 for iPhone
True VO2 Max — Cardio Fitness screenshot #3 for iPhone
True VO2 Max — Cardio Fitness screenshot #4 for iPhone
True VO2 Max — Cardio Fitness screenshot #5 for iPhone
True VO2 Max — Cardio Fitness screenshot #6 for iPhone
True VO2 Max — Cardio Fitness screenshot #7 for iPhone
True VO2 Max — Cardio Fitness screenshot #8 for iPhone
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About

This app provides lab-like cardio fitness insights using your Apple Watch, correcting for real-world factors like weather and altitude. It offers indoor treadmill tracking and helps you trust your fitness trend by removing misleading outdoor conditions.

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
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What's New in True VO2 Max

2.2

June 16, 2026

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.

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Subscription plans

Plus Monthly Subscription

Get access to all features in Plus

$5.991 Month
7 Days trial
How to cancel True VO2 Max subscription ⁉️

User reviews

Not great

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.

Response from developer

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.

Love the app!

It’s amazing that it factors in elevation and temperature during the run. Easy to use and set up!

Wanted to love it, but …

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
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Response from developer

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.

Wanted to love it, but …

… 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
Show more

Response from developer

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.

Not sure what this does

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.

Response from developer

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.

FAQ

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.