I have installed the app on android 7 now it connects with the serever but it then freezes immediatly. also had it on a tablet with android 4.3 same issue. It als does not respond to any touch on the screen. What is the reason for this?
have you checked it with the beta version?
Are you sure the app is "freezing" or is there just another app overlaying the owncloud app with a layer? I had the same once with one of those "bluelight" filter apps like Red Moon.