There are scores of iPhone apps out there that allow you to save articles for reading later, but Sight is unique in that it works on the basis of saving a webpage not by its URL but with a screenshot. Say you've clicked through to a story on Twitter or Flipboard and want to save it for later: just screenshot it and when you're ready to read it open Sight. The entire article is downloaded for offline access and the Sight reader allows for night mode and adjustment of text size. It also provides stats on your "sightings". I'll be using this instead of trawling through my favourites on Twitter.

https://sight.sc