Well I am thinking about installing my old Commando in my wife's car as a media player and a GPS. The plan is to make a charging cradle attached to the rear view mirror. Still playing around with the settings. What I want is it to come on when the car is started then turn off when the car is. Is there a setting or a app that would allow me to keep the screen on while power is applied to the charging cradle?? Then when the power is removed it shuts the screen off??