This is a pretty good app, but like another reviewer mentioned, it may ruin insight of your sleep analysis by other apps because its logging too many start/stop sessions in the data log kept by the Apple health app.
If you choose to use this app, you will have to go into the health app on a daily basis to clean up this unnecessary data so your other logging apps are not rendered useless.
If this can be fixed, then this would be an amazing app. Id like to keep using this app, but its a real pain to keep going into Apple health on a daily basis to clean up all the unnecessary data.
Deeedog D about Pillow: Sleep Tracker, v3.0.1