Root isnt for "free app from appstore" like apple, you can modify everything on your android, change android version to 4.4.4 (cyanogenmod or PAC-rom) or use game hacking apps like game killer/game guardian/game hacker/game CIH/freedom..... theres also always risk to break your phone durin process so read instructions and follow them CAREFULLY! i've myself broke my old phone while rooting (was noob) and you also lose warrantly when you do it.