I love zotero, and would never switch to Mendeley because of the lock-in problem, but the lack of any mobile apps is a real problem. Reading and annotating on

I love zotero, and would never switch to Mendeley because of the lock-in problem, but the lack of any mobile apps is a real problem. Reading and annotating on an iPad is a key ability, and the 3rd part PaperShip is buggy and no longer under development.