I'm not knowledgeable enough nor do I care to do something like this, but this is my idea. I'd like to get an app either through the App Store or Cydia something as described below. The idea comes from my Garmin GPS. When I turn on my Garmin and I am at a predetermined "home site", the GPS location automatically unlocks the GPS so I don't have to. I like keeping my iPhone locked with a passcode but when I'm home I would like not to have to do this. I've searched for something like this but haven't found it yet. If you are an app developer or know one, could you see if this would be possible?