Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Grammarly Keyboard - If you want your mobile writing to truly shine with its polish, you need the Grammarly Keyboard
Typing Speed Test - A simple typing test to see how fast you can type
Hacker's Keyboard - Are you missing the key layout you're used to from your computer when using an Android device?
keyboardlayouteditor - Powerful, visual designer for designing and editing keyboard layouts.
CozyKey Pro - CozyKey is an intuitive iPhone keyboard for fat fingers.