iFlyChat comes with 4 packs of Emojis for the site adminstrator to choose from. Following 4 types of emoji packs are available :-
By default, Apple Smileys are used in the chat. To change the smileys pack, go to App Dashboard.
In app dashboard, go to Settings -> App. Here you can select the emoji/smiley pack. Refer to the screenshot below.
You can also DISABLE the emojis if you feel so.