There is NO app to root the Prevail !!!
EDIT : "i cant use odin to revert it to a older version sorry so dont freking post that countless times to me like on other postes wen i have no pc to use it on that will except my phone cus all i get it as on this only pc as unknowen device"
Well, as I said, there is no app to root your Prevail, but all the people here in this forum will be able to help and assist you. You are in the right place for rooting your Prevail........ However, you can still search around and maybe find "your app" and brick your phone or make a nice paper-weight out of it !!!!