Requires iOS 7+
This tweak provides the blurry effect (folders background, Spotlight UI, or dock) to the homescreen status bar. Note that this blurring method is not the same with BlurBar, tweak like this, or backdrop effect. Check the screenshot if you don't understand. :)
This iOS 7's blurry effect is theoretically faster than the iOS 7's backdrop effect (Control Center, Notification Center, alerts, tabs, navigation bars, and etc.) because the only layer it uses is the wallpaper view. So it is widely used by many blur views in SB page as I told above, especially folder icons background.
Open source on Github
Configure blur styles from Settings.