The app uses the Xposed Framework, which has gained momentum recently for opening up avenues of customization without needing a custom ROM on any device. Wanam Xposed will let you do stuff such as enable camera during calls, enable call recording, add 4-way reboot options to power menu, unlock Multi-Window for all apps, kill apps on long-press of back key, customize the status bar (transparency, toggle customization, etc), customize theme of icons and menus, and a lot more.
Wanam Xposed is free on the Play Store, though since it requires Xposed Framework, something that can present a few risks, it is recommended that you backup your ROM through a custom recovery first before attempting anything. Once you’ve done that, hit the source link to find out how to set up your device for using Wanam Xposed.
P.S.: You can also try out Note 2 Hidden Settings, an app which doesn’t require Xposed Framework but is also safer, though with lesser amount of tweaks.
