this post was submitted on 18 Nov 2023
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Forgot to wear Apple Watch to bed. It calculated sleep time anyways. How? (alien.top)
submitted 2 years ago by SecureUse155@alien.top to c/apple@hardware.watch
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I usually track my sleep data with my watch but I fell asleep with it off. Yet it informed me of sleep data anyways. How did this happen? Was this just a rough calculation based on previous nights where I wore it?

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[–] DJtheMan2101@alien.top 1 points 2 years ago

Even without a watch, your iPhone can estimate how long you sleep based on your set sleep schedule and if/how long you use your phone at night. You need a watch for tracking sleep stages and more accurate data.