Not sure that sort of low level access is possible while the app is backgrounded. However, automatic sleep trackers have been available without official API sin

Not sure that sort of low level access is possible while the app is backgrounded. However, automatic sleep trackers have been available without official API since what, watchOS 2? So maybe. You can also try to convince Apple to add that workout type. https://support.apple.com/en-us/HT207934 https://support.apple.com/en-us/HT207934 Look forward to WWDC 2021, introducing the favorite workout type of billions of people.