iPhone and Android
If Sleep Cycle cannot wake you during light sleep, it will automatically wake you at the end of the wake-up window.
For example, if you’ve set your alarm to wake you between 7:15 am and 7:45 am:
- At 7:10 am, you’re almost awake but slip into a new sleep cycle just before the wake-up phase begins, and by 7:35 am, you’re in deep sleep.
- Since the alarm must go off by 7:45 am (the end of your wake-up window), Sleep Cycle will wake you up during deep sleep if your wake-up window doesn’t align with your sleep cycle.
This can happen, and if it occurs frequently, try adjusting your wake-up window (shorter or longer) or changing the time you set the alarm for.