I use Instapaper and Pocket and you might ask why as they are both "read it later" apps. 

The reason is that they both have unique features that I use. Instapaper provides a way to highlight text in an article an I use a IF applet to store those highlights in Evernote.

Pocket does not provide highlighting but it does provide tags, which I use with another IF applet to curate articles on tech2watch.info. 

Instapaper does not have tags, but it does have folders that could be used like tags but are not as flexible because an article cannot be in two folders at the same time

I really wish either Instapaper had tags or Pocket had highlights. At one time Pocket did have highlights and I would gladly pay for the premium service if it were brought back.