Looking for an Android app for uploading txt notes

I am looking for an Android app for gtd capture process. Basically the flow should go like this:

  • open app or widget with one touch
  • write note & hit send
  • the note is uploaded to a designated folder in my Nextcloud as a (separate) txt file

I though this would be a very easy to goal to reach but I really can’t seem to find any Android apps that does this. Tried so many note taking apps. Any ideas on how I might achieve this? Don’t mind paying a little for a license.