@birgit-egroupware Hi Birgit, currently it is available in the Play Store beta channel of DAVx5. You can join it on your mobile device here: https://play.google.com/store/apps/details?id=at.bitfire.davdroid
We will also update the tweet when it has been built by the f-droid.org team (it usually takes a few days after we’ve tagged the gitlab repo).
Have a nice weekend,
PS: I can also directly send you an apk if you want (you know my email ;-))