Would be nice to have an option to also track screen off time w/ history by tapping a button on the notification to start monitoring. I have a really bad insomnia (more than 2 nights w/o sleep lately but it's been improving) and will be nice to be able to track the time the phone has been off because I almost always check my phone before going to bed and just right after waking up so screen off is a good indicator that I've fallen asleep.