If you've ever changed your phone number or home address in the past few years, you'll know what a pain it is to make sure the right data gets to the people you want. Addappt takes the pain out of that process by letting you share contact information directly with your friends. When you update your details, the changes are automatically synced on your contacts' phones so they won't have to lift a finger. The app pulls initial information from and subsequently updates your device's address book so you'll have the same information across the board.
More: Best Smartphones 2014