My friend zenly when he never unlock the screen, then zenly totally will be stop, when my friend unlock the screen use WhatsApp or any apps then the zenly will run again, may I know why will like that? Not one or two days, always like that the problem, then sometime also will show on the screen my friend zenly is on the move, but my friend phone is charging never take the phone move on, can tell me how to do then my friend zenly apps won't always have like that the problem?