On android 8. I hate apps that go full screen and take away my clock and batter notifs. This allows me to keep both, and is very customizable. Definitely Worth the $2.59! No other app I've found (that still works!) has worked to do this. If you want to keep your clock available even when apps get rid of it, this is definitely the app for you. Unfortunately, it is inexplicably weak on the available options to display. No option to show battery icon, to show whether you're charging or not. No icons for Location, bluetooth, NFC, cell signal, mobile data, 4g, lte, Alarm, airplane mode, Wifi status (although it can show wifi strength), Do Not disturb status, etc. These would all be great to have, but The most pimportant thing for me, by far, is clock and battery, and that's enough for me to be happy with the purchase.