Great news for Mac App Store customers as all of them will receive 1Password 4 as a free upgrade. Furthermore, all website customers who purchased 1Password for Mac in 2013 get version 4 for free as well.
New features include:
Redesigned interface - crafted with Mavericks and simplicity in mind
Multiple and Shared Vaults - create separate vaults to share with business or family members that each get their own sync preferences and locations.
Shared Items - if sharing an entire vault is overkill, you can share individual items (Logins, Secure Notes, memberships) with another person via email or obfuscated iMessage. Just like in our iOS version, if your recipient makes changes and shares the item back to you, 1Password will update your existing item.
256-bit Authenticated Encryption PBKDF2 with HMAC-SHA512, and other major security enhancement - 1Password not only keeps your data private, but also tamper-proof. This forestalls many attacks that haven't even been dreamt of yet.
Wi-Fi Sync is back - many of our customers asked for a way to sync with 1Password 4 for iPhone and iPad but keep their data out of The Cloud, and we delivered.
Favorites - just like iOS, quick access to your most important and frequently used items.
1Password mini - a full-featured menubar utility with full vault search, item details, vault switching, window anchor options, and more.
Third-party App Integration - You can choose to enable support for Alfred, LaunchBar, and Quicksilver, allowing you to quickly search and open Logins from the Macís great productivity utilities.
We've recently reviewed iPassword 3.9.6 and we had several problems with it. We're now testing version 4 and so far it outperforms the previous version in every aspect.