Just a quick suggestion regarding the iOS 1P app. I think there is a potential for confusion concerning the Master Password. Because you're using that label, I wonder if I am changing my complete Master Password across all platforms, or just the iOS one. I think it'd be nice to properly identify and distinguish that you are only changing the iOS MP when you change your MP on an iOS device. i.e. Amend the label on the app to be 'iOS MP' or something similar.
Do you understand what I'm on about?