“Needed sleep” is just a timer | Voters

“Needed sleep” is just a timer

Bobby Tromm

I expected that the “needed sleep” alarm would detect when I fell asleep, and wake me up x amount of time after that. Instead, it counted the hour I spent reading before falling asleep as part of me sleeping, and woke me up well before I needed to.

16 hours ago

Randell

Hi Bobby Tromm, The “Sleep Needed” alarm uses your Time in Bed against your Sleep Needed to determine the wake-up time. However, it doesn’t detect when you actually fall asleep in real time. This is because sleep stage data, including the moment you fall asleep (First sleep stage data), isn’t available to the app until after the sleep session ends, or when your Apple Watch logs it to Apple Health.

It is recommend turning on the alarm only when you're about to sleep.