Not very useful, too full of crud
The idea of what Keymoji is sounds smart, but in practice it is pretty ridiculous and poorly executed.
Do you want a handy way to search emoji characters based on keywords? Well, you wont find it here. Instead youll find hundreds of bizarre and quite useless emoji phrases that come up whenever you type anything in. Theres lots of Emoji art that isnt particularly inspired but this keyboards suggestions are too cluttered with crap to make it useful in any meaningful way.
If you want a solid Emoji keyboard check out Emoji++ by David Smith. It does cost a buck, but it is a nice improvement over the stock iOS keyboard.
Supacon about
Keymoji : Emoji Keyboard, v1.3