This app will automatically make a wake-up call, even if you oversleep.
If your OS is 6.0(Marshmallow), you need set permissions.
Go Setting -> App -> AutoWakeUpCall -> Permission, and turn ON all permissions.
* You can use only by setting the time and contact of wake-up call.
* When the time of the wake-up call, this app will automatically make a call.
* When there is an incoming or outgoing, then automatic wake-up call is canceled.