The other way to add a friend is via Contacts. Tap on Community > Add friends > from Contacts and then connect with friends listed under "Friends using ZenFriend". It's important that your friend is a registered member with ZenFriend, and it's also important that you have your friend in your address book with the same email address that he used to register with ZenFriend. We cannot match names for the moment, we only match email addresses.
If you use the Add Friends from Email feature, your friend receives an email with the suggestion to install ZenFriend. You are NOT automatically connected as friends. To connect as friends, use the methods described above. The same is true if you add friends who are not yet registered with ZenFriend.
Once a friend request is sent successfully, your friend needs to tap on Community > Friends to confirm your friend request.