Is there an RSS reader app that can download full articles instead of abstracts? One of the main blogs I'm reading has recently transitioned from publishing the full posts in its RSS feed, to publishing just the first few sentences with a "read more" link. This drastically slows me down when reading, as it requires an extra tap and a good number of seconds to load the full, heavy web page instead of the previously light article.

Is there any app that can automatically fetch the full articles from a blog when reading the feed, or - better yet - store all of them in advance so that it can be read offline?
Edit- Newsflow does exactly this with the ability to save article to pocket for offline reading

Also this can be done with Feedly with a simple tweak. Adding a user script called 'full feed' that you can plugin with tampermonkey or stylish that expands the entire article inside Feedly. This also can be saved to pocket for offline view.