I have installed a Samsung galaxy tablet into my RAV4 and used it as my main car stereo and navigator. when the engine is on i have to reopen music apps etc. i recently found an app on Google Play that as soon as you unplug the charger it automatically pause all media and navigation apps and when you turn on the engine the tablet goes on again without pressing the power button. so, GPS is on again and music continues exactly where you had left it It is called Autosleeper Auto power ON-OFF and i found it at Google Play. Is there anyone who has used it? I am quite happy but i'd like some feedback for this app or alternatives..