For iPhone User please try "AEI Keyboard Note" App. (This app is Free)

Original Danish Keyboard for iPhone & iPad
* With Arrow Keys
* Ideal Key for iPhone
* Easy to input “å Å ø Ø æ Æ"
* iPad Special Ten Keys like PC Ten Keys.

If you want to use Norwegian, please select Norwegian mode from Tools Setting.

Useful keyboard Settings (tap"tools" Yellow icon)
You can turn off Key Sound from it.

Please add this Keyboard from iOS Setting and switch "Allow Full Access"