VO₂ Max - Cardio Fitness is a lifestyle app designed for iPhone users. Developed by Bernhard Hering, this full version app falls under the Health & Fitness subcategory.

The VO₂ max value is a crucial indicator of the body's maximum oxygen absorption during intense physical activity. By maintaining a high VO₂ max value, the risk of cardiovascular diseases can be significantly reduced.

One of the standout features of this app is its compatibility with the Apple Watch. The app provides real-time updates of the user's VO₂ max value directly on the Apple Watch. It supports all complications, turning the Apple Watch into an essential fitness gadget.

To estimate your VO₂ max, the Apple Watch uses continuous heart rate measurements during a brisk hike, walk, or run outdoors for at least 20 minutes. The workout app must be used with GPS enabled for accurate predictions. Additionally, the app needs to be connected to the Apple Health app to display the recorded data on the watch app, complication, or iPhone.

With the release of iOS 14, users can conveniently display the VO₂ Max widget on their iPhone's home screen, allowing them to view the latest measurement at a glance. It's important to note that this app is compatible only with Apple Watch Series 3 or later models.