It used to work but now ...
I used this up in June 2014 while visiting Copenhagen and found it very convenient. Now, in May 2015, I am back in Copenhagen but the app is useless because I cannot enter the required type of card. The last update of this app was several month ago. It is sad and a shame to experience this kind of "support".
AdrianY about
DOT Mobilbilletter, v1.6.4