What are some alternatives?
When comparing BusyBox X Pro and Kingo Root, you can also consider the following products
King Go Root Checker - King Go Root Checker is a platform that enables the users to know whether root access such as Superuser has been installed on their device or not.
Magisk - [2018.12.8] Magisk v18.0 - Root & Universal Systemless Interface [Android 5.0+] Magisk
Root Booster - Root Booster is an application that enables the users to run their applications more smoothly without any delays, and it also improves the battery life of the mobile device.
KingRoot - KingRoot is an application that allows you to root your mobile device in a matter of seconds.
Root Genius - Root your Android phone with just one click.
Root Checker - Root Checker is an application that helps the users to check whether their device is rooted or not.