No need to install keyboard
You can just ignore the keyboard installation part which can access you personal info and just use the stickers and emojis like any other emoji apps. Im guess you can use the keyboard to be able to use the stickers inside any apps (I.e fb, whatsapp etc) not just the messenger app. Anyway, I just wanted to let the ppl who are a bit skeptical about this. Its safe to download as long as you dont bother going to setting and allow/install the keyboard.
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KEVMOJI by Kevin Hart, v1.2