Wifi Password(ROOT) is an app that displays all the WiFi passwords stored in your Android. That being said, it won't let you hack or audit WiFi networks. It only displays passwords from WiFi networks that you were previously connected to.
It's very important to remember that, as the app's name suggests, it's essential to have a device with root access to be able to use it. If your device is not 'rooted' you won't be able to use Wifi Password(ROOT) properly.
Wifi Password(ROOT) is a very useful app to let you take a quick peek at any password from any WiFi network you've ever used.