Judging from its good compatibility and deep support for older Android OS, iRoot could be the best and free Android rooting software. Fone - Root, ranked by their overall performance. They are iRoot, MobileGo, SRSRoot, KingoRoot, and Dr.
![xda universal android root xda universal android root](https://www.xda-developers.com/files/2015/09/bloat-810x298_c.png)
![xda universal android root xda universal android root](http://d.ibtimes.co.uk/en/full/303833/root-all-htc-android-devices-new-htc-quick-root-tool-installation-guide.png)
XDA UNIVERSAL ANDROID ROOT HOW TO
To be honest, we're not in a rush to learn how to root Android devices easily with the best Android rooting software or app. Part 1: Reasons & Preparations for Rooting Android Phones
![xda universal android root xda universal android root](https://www.xda-developers.com/files/2015/08/image011-640x1024.png)