Pandora has released updated mobile apps for Google Android and Apple iOS. The updated app comes with a Sleep Timer feature that lets you schedule when the app should stop playing music. You can set it at 15/30/60 minutes interval.
The idea of this feature is that you can set an interval when you are listening to your favorite music before going to sleep. The app would stop playing the music after the set time by which time you would have fallen asleep.
It would save you bandwidth and wasted battery on the phone. The company claimed that this was one of the most requested features from their community.