Wherescope launches today – it’s an app that uses GPS to tell parents where their kids are.  Parents can set up geofences – like home, school – places where they usually expect their kids to be, and get notified when their kids arrive or leave.  And, if the kid turns off the app, parents will get notified about that, too. The Wherescope folks say this is more accurate than AT&T’s FamilyMap kid tracker service which uses cell tower data instead of GPS. Right now, it’s only available on the iOS4.