Has anyone used any of these apps when exploring cities?
Field Trip is free for Android and iOS. It is a Google designed app that uses your phone’s location service to pick up on what’s cool around you.
Historypin is free for Android, iOS, Windows Phones. You can pick a landmark and see what it looked like a hundred years ago.
Stray Boots does cost per tour for Android and iOS. Families or groups may enjoy the combination of a city tour with a scavenger hunt.