Rene Ritchie relaying a message from AgileBits:
1Password 4 for iOS is a brand new app. It will require a purchase. There will be a special price available at launch time. The existing 1Password iOS apps will no longer be sold. They will continue to be supported, will sync with 1Password 4 and be available for download in the “Purchased” section of iTunes.
We knew this would start happening at some point. With no upgrade pricing it’s the only way. I am OK with this. But there will undoubtedly be backlash.