Quick start
Open the app, allow location, choose whether to enable Open and Close notifications. Lüften will check the forecast and tell you when to ventilate.
Common questions
Lüften isn't sending notifications.
Check Settings → Notifications → Lüften → allow. Re-toggle the Open / Close switches inside the app to re-schedule.
The recommendation looks wrong.
Pull down on the home screen to refresh the forecast. If it still looks off, the local hourly forecast may have updated late — check again in 15 minutes.
How do I delete my data?
Settings → Delete my data. This removes the device row from the backend and clears local storage.
Contact
Anything else: support@luften.app. I'm a one-person team and reply personally.