What emoji app should I get?

Hi! I have a mesly little problem I want an emoji app that goes to my keyboard when typing And I can't find any in the reviews I have an iPhone 4S! I would really like to know what works the best and that goes in your keyboard when typing!

You don't need to get an emoji app. In settings, go to keyboard, and add a new keyboard. In the list, there should be emoji. Then, to switch, you press the button that looks like a sphere diagram. Also, it pops up in your keyboard.

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