I installed the Nextcloud Android app and set it up with my Nextcloud server.
Since Docs and Sheets from Google are pre-installed I thought I can just use these two apps to edit the documents that I open from the Nextcloud app. However, both apps auto-save the opened files to Google Drive and subsequently only modify the Google Drive version of the file. Therefore Nextcloud will never know about the changes I made to a file. Plus I don’t my files to stay on Google servers anymore which brought me to Nextcloud in the first place.
I also tried Microsoft Word App. But I quickly realized that I will either have compatibility issues with xlsx files created on my Ubuntu (editing not possible in Word unless I save a copy, again) or I will have to convert odt files to office format using a Microsoft Online service which is similarly bad to storing data on Google servers in terms of privacy concerns.
So I am wondering what the document editing use-case on Android actually looks like? Any recommendations?