If you have an iphone you can play the music and go to your clock.Than go to timer and click the time you want.Then go to ringtone and scroll all the way down until it says "stop playing" than click it and start the timer and lets say you put it for 30 minutes then when the 30 minutes is over the music will automatically stop.This works for any music app!
If you have an iphone you can play the music and go to your clock.Than go to timer and click the time you want.Then go to ringtone and scroll all the way down until it says "stop playing" than click it and start the timer and lets say you put it for 30 minutes then when the 30 minutes is over the music will automatically stop.This works for any music app!