Based on Flym and Sparse RSS, this checks RSS/Atom news feeds, polling for updates from the device on a regular basis. Fetched items are available for offline reading.
You probably already found this, but check out OCreader, which works great (not as polished as spaRSS imo, but still). It should be possible to merge this feature into spaRSS, which would indeed be great :+1:
It would be great if this application could synchronise with Nextcloud News.