Sevgi Pusulam
A needle that always points at one person.
Sevgi Pusulam is an iPhone app for two people. Its compass needle points at your partner and shows the distance between you, wherever you both are. Your location is shared only with the one person who said yes, only while the app is open, and only your latest position is kept, never a history. You also get a private chat for the two of you, and Places mode turns the needle towards a place you love.