I need the game to remember the system time at which you were last playing the game. There are plenty of 'idle' games that do this. I can't expect the player to press an exit button either. Likely they will just close the app with the device buttons or it just suspends.
Maybe that's the answer..can I detect device button and not quit until it's saved??
So far though the only way I can think to do it is saving the time every second of so unless there is another way I missed?
On application end would be perfect of course..