If your router is vulnerable, this app will allow you to try different default pins or simply to bruteforce a WPS router. You can easily restore your password: this app shows stored password, and it can decrypt the wpa_supplicant file in which they are saved!
Thanks for your feedback!
This app works only if your router actually is vulnerable, if it doesn't, your router is safe from this attack.
If you have any suggestion contact me and i'll be glad to help you.