Web clipper works great on a desktop web browser and saves content, but this uses a browser plug-in and I can’t think of a practical way to save an article on a mobile device (phone or ipad). Also, pages are converted to Markdown, which is usually helpful, but rendering can be different and I recall running into occasional issues. Now for reading, the mobile app at the time (I think still true) renders in Markdown, not a weblike view, so the reading experience wasn’t great (no inline pictures, diagrams). However, for pulling content it worked very well.

Joplin has a web clipper, so it can be used as "read it later" tool