Emoji Font

다음 모든 emojis을 볼 수 있습니다 이모티콘 글꼴을 설치, 당신의 이모티콘 생활을 즐길 시작

It is an Emoji font, you can open the app and select the "Font Style" to select "Android Emoji".

Or:

Goto System Settings -> Display -> Font Style, then select "Android Emoji"

In samsung device, such as galaxy s3 or s2, sometime you find some blank or square for emoji symbols , please update system to android 4.04 and above, then set font to default in setting. If still don't display emoji symbols please install this font ,and set font to Emoji in setting.