You can easily save battery while you are sleeping.

Stop music and video at the specified time,
and saves battery during sleep.

* Stop playing music, video
* Turn off Wi-Fi
* Turn off Bluetooth

Permissions
'Sleep Timer' is NOT collect any personal information.
* permission about Wi-Fi : Turn off Wi-Fi
* permission about Bluetooth : Turn off Bluetooth
* control vibration : For vibration.

Contact
support@fxx.kr