Is the app compatible with Fire HD?

Welcome to the community, @Silke_Royer! :grinning_face_with_big_eyes: You can use the browser version virtually anywhere, though its usability will depend on your Fire HD’s screen size. The mobile versions only work on iOS and Android. From what I found, the Fire HD runs Fire OS, which is apparently based on Android, but has proprietary software as well, so it’s difficult to say if the Android version of the Airtable mobile app will work.

Thank you so much for the answer. It was very helpful.