Pack 2 has been released, but hasn't gone live in the App Store yet, due to a temporary issue at Apple.
In the meantime, you are welcome to join the TestFlight to get it early, or read the release notes to learn more.
Want to know what has changed since a previous version? This page lists those changes. You can alter the range of release notes to display if you wish.
The latest release of Pack is version 2.1.