As with the desktop version, the feature I use most on the iPhone is 1Password’s ‘auto login’ feature. You can either use the app’s built-in Web browser

Unbelievable, this was the first iPhone app I ever purchased. Purchased it even before I actually got my iPhone. I didn’t even know this build in web browser feature existed. This is going to completely change how I use this app.

(Via 1Password and 1Password Pro for iPhone Review | Software | iPhone Central | Macworld.)