You can download the app on their official site. This one also offers one-click rooting and unrooting button and works on both Windows and Android OS. Next is iRoot, re-branded app from vRoot. Both PC and APK versions are available.
You can download the app on this page: Kingroot Official. You just need to download it and click the rooting button to root your phone immediately. This App is very easy to use and one of the most used and received a lot of good feedback from their users. It offers both Windows and Android rooting tools and one-click root functionality. It supports more than 100,000 Android smartphones including Sony, LG, Samsung, Google, One Plus, Huawei, and HTC Phones.
