This application will show a black screen whenever you place your Android Wear watch on your charger.
This way you won't be bothered by the light of the watch when you are sleeping and will avoid any screen burn-in.
This app will also work on watches with custom charging screens (like the Moto 360), by retrying to open the black screen after a configurable period of time.
If you tap on the screen when the watch is charging, it'll show the current time for a few seconds.
You have to open the app on the watch at least once before it can detect when you connect it to the charger.
Please note that this is an early version of the app, if you have any troubles, please send me an email and I'll try to fix it.