Problem: For signed-in user it would be nice to see their Watchlist in mobile app.
Proposed solution: Provide a watchlist (synchronized with web watchlist) for users, let them watch/unwatch current article.
Who would benefit: Signed-in users / contributors
More comments: My personal case: I read an article on my phone and want to add it to my watchlist to contribute later on desktop. I want to just press usual blue star on article. Accessing to my full watchlist from the phone would also be useful.