Contact

One person, one address, usually an answer within a few days.

A word is missing, or one should not be there

The most useful thing you can send. Name the word and, if you have one, a source. The list comes from an extract of the German Wiktionary, so it has holes the Duden does not, and words the Duden would not print.

Something is broken

Say what you did and what happened instead. The version number from the Play Store listing helps more than a screenshot of the board.

Your account and your data

Deleting is something you do yourself, in the app, and the deletion page explains why it cannot work by email. Anything else about your data is answered here.