We do that with Nextcloud News: https://github.com/nextcloud/news/#nextcloud-news-app

I’d be interested in what you think about it. It’s completely open source, so any feedback or contribution is much appreciated! :)

I use Newsblur and see everything in the feeds I follow. The "training" and etc. are optional.

NB filters "inappropriate" images from my feeds, which is annoying.

Happy Newsblur subscriber here. I've never missed anything in a feed (other than the HTTP/HTTPS errors that my browser gives me)

Are you referring to it only keeping the last month or so of feeds?

Can you expand on this?