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?

  • DJtheMan2101@alien.topBEnglish
    1·
    10 months 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.