Master Your VO2

VO2 Master is the world’s first wearable, affordable, and easy-to-use VO2 monitor.

You can now access the single most important metric in sports performance, anywhere and anytime.

Wearable VO2


Live data display

Free iOS and Android App

Connect your other sensors


Export Data for Further Analysis

4+ hour battery life

Accurate and repeatable


Replaceable mouthpieces

Laboratory testing is designed to maximize internal validity and reproducibility. This can come at the expense of external validity, particularly when event conditions move well outside of normal laboratory parameters in different ways.

Stephen Seiler

2011 A brief history of endurance testing in athletes

Get out of the Lab

VO2 Master Pro