It is an Iridescence keyboard theme for "Emoji Keyboard - CrazyCorn"
Iridescence Theme for Emoji Keyboard - CrazyCorn, designed by CrazyCorn, Getting this cool theme to make your CrazyCorn more lovely and colorful.
☆ This is not a standalone app, you need to download the LATEST version of Emoji Keyboard - CrazyCorn app in order to apply this theme. (Search “Emoji Keyboard” to download it)