It's a app that can play music when you sleep.
You can :
1. custom how long you want to play, and then it play music with a duration approaching what you expected;
2. custom music library; and then it can choose music from this library randomly overtime.
So, all you need to do is:
1. open this app.
2. click HOME button to close this app.
It's so easy, right?
With you have Sweet Dreams every night~