An app that is open source and can extract the page content in a simplified “Reader Mode”.
This might not fit your workflow, but Thunderbird can be used as an RSS reader. Go to File > New and add a new Feed Account
I was hoping for this to work but it doesn’t parse the full content. Weirdly also it didn’t import correctly the opml file, the folders where there but they didn’t have the rss link.
I just imported an .opml with folders into Tbird 102.13.1 and the items in the folders were there. I don’t know about the parse full content part.
Emacs
FreshRss! It’s a selfhostable web app/server with a browser reader.
The full text extraction takes some technical fiddling and reading, but it works like a charm!
Can’t go wrong with Fluent Reader. It’s beautiful and featureful, has a reader mode as well.
Wallabag might work.
Nextcloud’s news reader is pretty good – but you need to host a Nextcloud instance first :) (Hint: you should, to free yourself from google/icloud or whatever you use)
https://lemmy.ca/c/selfhosted@lemmy.world
https://github.com/nextcloud/news
Desktop and mobile clients are available.
I’m a fan of KDEs Akregator. It does a great job as a feed reader and shows the contwnt of an entry in a simplified reader mode. However some feeds jist dont display the full arricle in their feed entries so you’d have to follow a link there. But even thats sth that makes Akregator awesome: you can specify the command thats used to follow a link and most browsers have the option to open a page in reader mode via the commandline. So from what I gathered thia should pretty much do all you want it to and then some.
Akgregator is great but I’m not sure about Reader Mode
Liferea does the job and worries pretty well.
ttrss might be an option if you’re into self hosting
I am using feedpushr which sends articles to my mail.
Gnome Feeds
Self hosted, very simpel, runs in browser (therefore accessable cross-plattform, mobile and desktop) and looks good enough.
It was my initial idea to consume news after reddit died for me. Thankfully, Lemmy files that gap <3
rss2email combined with any mail client
(best to use some dedicated mail account though)
Feedbin. Not a Linux app, but a web app. And not FOSS or self hosted. Just a really great app run by great people for a great price. Parses full content and has a pretty nice API.