Swirl is a new mode that adds an orbiting rotation to the Home screen app icons as you swipe to a new page. It fades in the icons from a new page, and fades out the icons from the previous page, all while performing the swirl animation.
The two new modes can be activated from the Barrel app itself which can be found at your iPhone’s springboard or via settings..
One update that I’d like to see developer Aaron Ash make is with the Barrel app. Although the app is nothing more than a mirror image of the tweak’s preferences, which is obviously optimized for the larger iPhone 6 screen, the app isn’t yet optimized.
If you already own Barrel, this is a free update. If you’ve yet to purchase it, then you can find it for $2.99 on the BigBoss repo.