SIM808 car tracker without arduino?

I was wondering if there’s a way to program a SIM808 to work as car tracker without being connected to an Arduino? Since I plan to use the car’s battery it would be better to have as few devices as possible (arduino needs a 5v regulator) even though they will be most of the time in sleep mode, right? My idea is for it to check a SMS request every now and then and send another SMS back with location info and battery voltage.