True VO2 Max — Cardio Fitness

Name: True VO2 Max — Cardio Fitness
Rating: 3.7 (12 reviews)
Author: DANIEL BLACKBURN

By: DANIEL BLACKBURN App

VO2 Indoor & Lab-like Tracking

Overview

Version:

2.5

Last updated: 2026-08-02

Ranking

#336,578 ▼ 84

Overall

Features & Capabilities

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.

User Growth & Download Statistics

App

By:

DANIEL BLACKBURN

Rating:

3.70

(12)

Version:

2.5 Last updated: 2026-08-02

Version code:

889151819

Creation date:

2025-10-22

Compatible devices:

Size:

42.65MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-08-09

Compare stats and ranking:

Ranking

# 336,578 ▼ 84

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

DANIEL BLACKBURN

Apple Apps Store

https://apps.apple.com/us/app/true-vo2-max-cardio-fitness/id6751441781

User Reviews

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.

by sr*****, 2026-07-26

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.