Use APKPure App
Get Raven Keyboard old version APK for Android
Raven keyboard is the best keyboard app to use with EmojiSwitcher app
Raven Keyboard is the ideal keyboard app if you are using Emoji or EmojiSwitcher app to render more Emoji packs like OS phone emojis or any other emoji will be rendered with no problem
more features and themes to come later
and happy to get your suggestions ;)