I was wondering if it�s possible and how to handle a paperchase-game, I want to design for my brother.
It should work this way:
-You enter a location on your mobile ( street xy for example)
-you lock your phone and start the journey
-once you are in a specific radius (like a 1km bubble from street xy) it should play an alarm sound
The phone needs to be locked of course, you should not need to carry it around the whole time.
Any ideas how to do that? :)