Unlocking Door the Simplest Way

Is this because those users are not as technical? It should be easy enough to set up a routine/widget to lock or unlock the door.

Solid presence detection depends on any number of factors, some of which may involve black magic. If your iOS users are savvy enough to tap on the icon in notification center that may be more secure than using the geofencing.

I think my son would have no problem, its my wife and daughter who might have problems.

I will have to keep an eye on this thread with fingers crossed