Write to us
However carefully we check, a mistake slips through now and then. Please tell us when you spot one — and equally when you think we could do something better.
Feel free to write in English or German.
Thank you, we have your message
We read every message and will get back to you.
What helps us most
- For a bug: what you did, what happened, and what you expected instead.
- Your device and the app version (in the app under Settings → System).
- For a level: the topic and the difficulty.
Deleting your account
You do not need to write to us for that — it works instantly in the app itself. How it works and what gets removed is described under deleting your account and data.