ECHOECHO MOBILE APP ALLOWS PERSONAL CHECK-INS

Cross platform mobile app EchoEcho allows the user to request the location of a single friend.  It integrates with your address book and sends a message to friends asking "Where are you?".  If your friend wants to reply, you are given their location, complete with distance between you and a map.  Definitely an interesting twist on geo-location and can come in handy for shopping, clubs, etc.

EchoEcho is available for Android, Blackberry, iOS, Symbian and Windows Mobile.