The HeyWay app on Iphone. I have it and so does a female friend of mine. We both know where each other's location is...right down to the street...freakin bird's eye view. She ain't my woman, but if you get this App, you or your partner can tell whose house you are at or not at. Basically a cheater's worse nightmare...Maybe if Tiger had a Iphone, Elin in the middle of the night could have put this App on his phone, and no worries...