Hello friends if you wanna hack someone WiFi using android mobile then you need some requirement :-
When you get both things then follow below steps :-
1. Open Wps Connect then enable Wifi.
2. Search Wifi by this app.
3. When you get someone Wifi click on it & try pin.
4. After some seconds you can see the password of that wifi.
5. Now you can copy that password & connect wifi.
Note:- This app shows wifi password only where WPS Enable, You can see in below video.
In this post if you have any issue then feel free to comment, I'll response on all comment as soon as possible.