A teardown of the latest version of the Oura Android app shows the company is working on adding heart rate zones.

On Android, Beats says all fitness and wellness apps with heart rate monitoring capabilities on the Android platform should be fully compatible with Powerbeats Pro 2.

The Powerbeats Pro 2 can’t play music while tracking heart rate on gym equipment Users are also complaining that the heart rate feature doesn’t work as well on iOS as on Android.