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You can add friends from your iOS address book by tapping the Friends button at the bottom of the app, then tapping the "+" button in the top-right of the screen.
The first time you launch this page, your device will prompt you for permission to access your address book. If you select "OK," your contacts with e-mail addresses will be imported into the friend finder screen. If you choose "Don't Allow," the Fitbit App will not use your iOS contacts for any function. If you decide later that you want to add friends from your iOS contacts, go to your Settings app and tap Privacy > Contacts > Fitbit. Next, go back into the Fitbit app, tap Friends, then tap the "+" button in the top-right of the screen and your contacts will show.
Note that your contacts must have an email address associated with their name in order for them to show in the Fitbit app.
The friend finder screen separates contacts in three ways:
1. Contacts on Fitbit--These contacts are already Fitbit.com users, and will have "+" to the right of their names. They will be added to your leaderboard once they accept your friend request.
2. Contacts not yet on Fitbit--These contacts do not currently have an account on Fitbit.com. Tapping "+" asks these contacts to join Fitbit.com and if they accept, adds them to your leaderboard.
3. Friends of Friends on Fitbit-- These users are exactly what the title implies: friends of your friends. If your friend has not privatized their friend list then you will be able to view and add their friends. You can do this by tapping your friend's tile on the friends leaderboard, then tapping the "+" symbol next to their friends.
Once you have your friends added, you can start a challenge or invite your friends to join it.
Hope this helps!
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