Not sure if that's an option or not, but I use omnivore for that. Freakin' life saver for me, because I love to read interesting shit, and anything that might come in handy for writing/citing papers later, but my life is weird and sometimes hectic, so I don't always get to finish reading something. Save it to omnivore, read it later. It even tracks progress.

This comes across as like an ad read, I promise it's not. I just really like the app, and found it by asking an almost identical question a while back