A free program for Android, by PransuInc.

Smart Night Clock is an app that helps you create a comfortable environment for sleeping. It can be used as a clock or calendar for keeping track of the night and day. This app is a useful tool for people who need to wake up in the morning or for people who have to get up in the night. It can also be used for creating a customized night clock for your phone.

The application allows you to use a variety of light colors and brightness levels to create the perfect environment for your needs. The application has a built-in alarm clock that can be used for waking up. 

It can also be used as a widget on your home screen.