Compatible with iOS 5, 6 and 7
Not compatible with iPad
Also: iKeywi HD for iPad
iKeywi is a keyboard tweak which can let you customize the keyboard.
*Add an extra row to your keyboard
*Customize keys to any character you like
*Compatible with ColorKeyboard (iOS 5, 6 only)
*The extra row only shows in portrait mode.
*Only "Standard" QWERTY, QWERTZ, AZERTY supported (iOS 6, 7)
*Only "Standard" QWERTY supported (iOS 5)
Configure options from Settings app
Note: This tweak cannot work in some apps which need root permission, such as iFile and Cydia
See larger Screenshots below