Users expect to register. I've seen UX lab studies testing it, without registration users get really confused and don't understand what's happening with their d

Users expect to register. I've seen UX lab studies testing it, without registration users get really confused and don't understand what's happening with their data. Conversion can actually drop heavily with non-registration approaches. Obviously it depends on the app, one where you only need to use it once you can and probably should design your UX to not need it. But if your app actually needs to maintain user state over multiple sessions then creating a user makes a lot of sense. (Although you can build up user profile over time rather than requiring it upfront)