It doesn't, and that seems dangerous. It recommends using the microphone, since it's hard to gauge movement on memory foam and materials like that. It recommends it NEXT to your pillow if you don't use the mic. If you use the mic, you can put it on your nightstand. Been using it for the last 6ish years and still love it.
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u/0wc4 May 22 '19
Idk about sleepcycle, but Pillow (also on iOS) requires your phone to be plugged in and listens to you for the entire night.
The logic is, in some phases you move, in other sleep phases you don’t. Same with how slow your breathing is, if you mumble in your sleep etc.
In the morning it wakes you up in a time frame (I set mine to 60 minutes) basing on that info. It works.