Vesper Syncing Interface Design
Dave Wiskus on Vesper 2.0 (App Store):
There’s an argument to be made for making the user enter their password twice, but I don’t buy it. Notes live on the device as well as on the service, so logging out (or not being able to log in) doesn’t carry the penalty of obscuring user data. If you mistyped your password and don’t feel like resetting it when you go to sign in with a second device, you can create a new account with a different email address and lose nothing. Resetting is tied to your email address, so it’s always there as an option.
See also Brent Simmons’ Vesper Sync Diary for the coding side.