Moon Board is a keyboard for iOS that offers an alternative keyboard to users that is customisable, easy to use, and fast.
You can customise and change the color of the keyboard and also adjust font size, and fully customize keyboard layout(QWERTY, AZERTY, or anything you want).
Swipe up to get uppercase letters, swipe left or right to get the numbers and special characters, and swipe down to return to lowercase letters.
swiping down twice will change the language.
With the support of Apple Watch, you can now change keyboard color from your Apple Watch.