Here is the link where i found it.
***I am not responsible of your phone is bricked or any other damaged by using this app***
* You need an active internet connection on your mobile.
* After you click the green ROOT button the rooting process starts and two application are downloaded. One is Kinguser like SuperSU/Superuser and another app Kingmaster(you can uninstall it later).
Features of KingRoot Application
1. 1-Click Root: KingRoot allows you to root your Android Device in a click. Simply, Download and install the application on your device > Open > Tap on Big Green Root Button > Rooted.
2. Comes as APK Application: KingRoot is a APK Application and it doesnt need any computer to get rooted. Simply Download the App and install it like you do with other Android Apps.
Points to remember:[*] KingRoot Application doesnt need any special guidelines to root your device. Simply Install the Application > Open It > Click on Root Button > Done. If in case you are still confused then see how to use kingroot to root android device.
[*] No data loss process: If you use KingRoot Application to root your device, then your Android Phone Data like contacts, pictures, videos, music and etc will be not affected.
[*] Warranty Void: Your Android Device Warranty may be Void after rooting with the KingRoot Application. So, Beware.
[*] Credits: KingRoot Application is created and distributed by Kingroot studio for free. So Full Credits goes to them for the Application.
AFTER YOU ROOT YOUR PHONE PLZ DONOT UPDATE VIA OTA IT WILL BRICK YOUR PHONE
FIRST UNROOT THEN UPDATE VIA OTA