Xposed, by XDA developer rovo89, is a framework for your Samsung Galaxy S4 (or other Android device) that lets you add tweaks and customizations to your ROM (either stock or custom) without any real hassle.
This pretty much means that your GS4 can have the features of a custom ROM without ever having to install one—and you get to pick and choose which softMods you want to add to your system.
Before Proceeding: Root!
You will need a rooted phone for this tutorial. If you have the AT&T GS4 with MF3 firmware, you can check out my full rooting guide for help. If you have another version, you... more