I think you should increase the focus on being multi-device. You're competing (I think) with Evernote and Pocket for example, both have outstanding cross-platform capabilities.

This looks fantastic when I want to save something from my laptop browser, but increasingly I find myself saving from a mobile. This is fine for Pocket or Evernote, I just share it to their app, but that's not an option here. I'm also not convinced from your landing page that I can have a satisfactory reading experience on mobile, you don't show that at all. You say I can access the data - but assuming you do have a good mobile reading view, you should show that.