The new Samsung Galaxy Note 3 brings several features and improvements over the Samsung Galaxy S4 flagship. While its likely that Samsung will bring some of the new features to their older (popular) devices, not all features will be shared across all of them. Luckily the members of the XDA Developer forum have managed to port some of these apps to the Galaxy S4 from a Samsung Galaxy Note 3 system dump.
Not all apps will work unfortunately, some will also require Android 4.3 Jelly Bean on Galaxy S4 to work, and others are currently in the process of being tweaked in order to make the magic happen on the smaller screened device, but this is certainly a good start.
Popular Samsung apps like Magazine and My Files are available to try out, while KNOX is something that is being worked on, although that may take a little longer to get working according to a forum member. Keep in mind that the apps on the Note 3 are optimized for the larger display size, so how they work on the smaller Galaxy S4 screen, remains to be seen. If you are interested in trying the apps for yourself, you can do so by following the source link below.
 | How to root your Samsung Galaxy Note 3 on Android 4.3 Check out this step by step guide on how to gain root access to your Samsung Galaxy Note 3 on Android 4.3 |
source - XDA Developers