Turns out you can have security and convenience. Long time users have 1Password, the password manager for iOS and Mac, have long suspected that very thing. But the latest version, 1Password 4, proves it.
I've already written extensively about 1Password 4's vault view, so if you haven't already, go read that now. All done? Good, because there's more. There's a wonderful web view that you can access with a tap of the globe icon or, more viscerally, pull open from the side. In it you can browse to any website you like, use 1Password to enter login, identity, or credit information, and go about your business. And then you can slide right back to vault view.
Given the limitations imposed by iOS, which includes no browser plugins or in-app communications beyond URL schemes, it's about the best way to maintain strong, different passwords across the web without locking yourself out of your own stuff.
Overall, 1Password 4 is simpler. It's more elegant. It's better.
And it's available now.
(Yes, it's a new app. Yes, it's universal for iPhone and iPad. Yes, if you bought the old version, you still have to buy the new version. Yes, it's on sale for 50% off at launch so everyone gets upgrade pricing. Yes, that's the only option Apple allows. Yes, I bought it immediately because I want to support great developers so they continue to make great apps. Yes, if you like 1Password, you should absolutely buy it as well.)