
Instapaper is a great read-it-later app. You can sort articles, not only by newest to oldest (and vice versa), but based on the length of the article also. Furthermore, you can save videos to watch later. Instapaper connects to Readwise, another helpful app, which allows you to build your PKM. You can also connect it to a Kindle. The app's quite easy and intuitive to use. It's design makes reading in it a joy. Review collected by and hosted on G2.com.
While I enjoy Instapaper, and the free version is decent, the premium version does cost $60 per year. That's decently priced, but you can use one of its competitors for free. Review collected by and hosted on G2.com.