You thought Yo was useless, meet Emojli. The new messaging app launched on iOS back in June but has started to gain popularity over the last couple of weeks. The app allows you to send messages between your friends by only using emoticons.
The app will ask you to register an account when you first open it up and once registered, you can add your friends to start sending emoticons and for those wondering, yes your username can only be made out of Emojis. Adding a friend is also particularly hard, since using another messaging app is required to send the combination of emojis to be able to even find your friend.
You can download Emojli for iOS for free here