I don't trust the results, it is fake / generating random data - Sleep as Android

Accelerometric sensors are really sensitive, which is great for sleep tracking. Normally, what you see when you leave the phone on the table gets immediately dwarfed when you do some more significant move. Just leave phone on the table for a while and you will see a dramatic development, but then move the phone and you will see all the development is really tiny in comparison to the new peak.

This is a companion discussion topic for the original entry at https://docs.sleep.urbandroid.org//faqs/dont_trust_results.html

Interesting. I was thinking that it would change to microphone if it did not detect movement. Your post seems to show me I’m wrong.