I am very surprised and disappointed that at January 2017  this app still has severe a reoccurring problems with saving & syncing articles to your account permanently. It just doesn't seem to work  I frequently lose my lists. And I've only ever used two Samsung Note devices over the past two years. To at least somewhat alleviate that issue  sync should be activated automatically and login as well as sync status should be visible while surfing (almost) any Wikipedia page / content  not just under Settings.
January 30 2017