Samsung is in the process of rolling out a new software update for the Galaxy S4 (GT-I9505) that brings features previously exclusive to the Galaxy S5: Kids Mode and Knox 2.0.
Kids Mode offers a child-friendly UI and allows parents to whitelist apps their kids can access on the Galaxy S5. The app also comes with a dedicated store called Kids Store that features an assortment of learning apps and games. As for Knox 2.0, Samsung is actively rolling out the latest version of its enterprise security solution to other devices after offering it exclusively on the Galaxy S5.
In addition to these two features, the update improves battery life and features general UI tweaks. The 130 MB software update (I9505XXUGNE5) is now live in Germany, and should be available in other regions shortly.