Steps to make the CoWriter Universal iOS keyboard your default keyboard on your device.
1. Select Settings on your device.
2. Select 'General'.
3. Select 'Keyboard'.
4. Select 'Keyboards'.
5. Select 'Edit'.
6. Tap and hold the 3 lines to the right of Co:Writer Keyboard.
7. Drag and Drop the Co:Writer Keyboard to the top of the list.