How to root & install custom recovery on LG G3 (All Variants)

If you have got your hand on a LG G3 device then you might wanted to root it and install a custom recovery in it. As their are many methods and tips are given on many websites and forums. Now i am going to give you a simple and easy way to root and install custom recovery on LG G3. All variants, almost, are supported.
After rooting you can flash many custom roms on your device. For some good custom roms listing click here
Best android custom roms available for LG G3:

First Disclaimer:
Your warranty is void now. I am not responsible for any mistake and wrong thing happens to your device. Always try if you have a good knowledge of that.
These steps are not an official LG  and therefore not endorsed by LG Electronics in any way. As such, this is a 'try-at-your-own-risk' approach. Please make sure to back up your important files when trying this for the first time. I take no responsibility for any undue outcomes resulting from the use of these steps. 

Things to need:
1: A computer running Windows (Any).
2:  LG one click root software here,
3: LG Drivers here
4: Flashify apk here or here. (Thanks to apk4fun.com).
Steps:
1: Make sure "usb debugging" is on from developer options. (If not turn it by going to developer option and check usb debugging section). If developer option doesn't appear press "Build number" from "software version" in "about phone" section for 5 times.
2: Install LG drivers of above 3rd step. After installation connect phone to computer.
3: Run "LG one click root software" of above step 2.
4: Click on start button. Wait a while. Allow permission if asked on phone screen.
5: Now phone will reboot in download mode after a while. Hold a while till it completes and reboot automatically. (In some cases it can stop a 90% . It just a bug simply disconnect mobile and start phone) Now Supersu will appear in apps drawer.
6: Now install flashify application (If not installed yet). Run it and grant root permission.
7: Press "Recovery image" and then "Download TWRP" from Flashify application. Select latest version of TWRP.

Wait for downloading to finish and then flash it. Done now you have a rooted and custom recovery installed LG G3
Note: You can also manually download a custom recovery image and flash it from "Choose a file" in step 7.
TWRP for all version can be found here
LG G3 all version TWRP recovery image:

Credits to:
@Dees_Troy & Team-win - for TWRP touch recovery
@thecubed & Team Code-fire - for Bump!.
Christian Göllner for wonderful app "Flashify".