Do you often wake up with your audiobook or podcast still running? Sure many player-apps feature a sleep-timer option, but if you are still awake when the timer fires you have to set it again by hand. When you are done you might be bright awake again.
With this app you can set a timer that stops your music AND => this app lets you extend this timer, after it fired, by simply shaking your phone. No need to look into a bright screen and wake up fully to reset the timer.
Just start your music or audiobook, open this app and press 'Start'. Leave the app running in the foreground, after a couple of seconds the screen will turn dark. The app will play a sound after the timer fired and wait for a motion. If a motion is detected the timer is extended by a custom amount of time.