One of the challenges most people have is keeping up with their data consumption. Even with all the awoofs from Glo. For this and other reasons, smart guys are out there looking for whose wifi to break into. You dont have to wait until you are hacked, find out how strong your wifi password is by hacking into your own wifi. As much as this method can be used to hack into a neighbor's wifi, I do not encourage it.

To get this to work, you need root permission on your android device. If your phone is rooted already, you are good to go. To hack a wifi simply go to google play store and download wps wpa tester, run it. It will detect any wifi in range.
Click on anyone. The app will send information about the wifi to a cloud server that uses various algorithms to decode the password. The password will be displayed to you.
Go to wifi, scan for the wifi network you want to connect to, click on connect and enter the password generated by the app.
Its that simple!
Source:http://www.timigate.com/2016/11/coolest-way-to-hack-wifi-password-on.html#more