How to be more protected from WiFi Password Cracking Apps for Android?

MAC ban manually

You can block his MAC address I guess =d

It's been awhile since I looked into WiFi cracking, But WEP should be avoided as well as WPA1 authentication. WPA2 is really the only trustworthy choice left for most routers. Also use AES instead of TKIP for encryption.

Edit: Setting up to allow only static mac addresses is a good idea if you do not have multiple devices and friends visiting/using your Wifi alot (You would need to add the devices mac address each time if so). Banning his specific MAC address won't really work because he likely would know how to change/spoof it.

Not sure how to prevent someone from cracking your wifi security but you can use mac filtering to deny all unrecogniseable devices. Even if they have your wifi password, their devices will be denied if you add the mac addresses of each device to your deny list.

Problem with this is you might have to periodically log into your router to make sure there are no unauthorized devices that are connected.

Pretty sure wifi cracking is against the law

What a shitty neighbor ._.

1. ALWAYS use WPA2PSK encryption with a reasonably long key (10-12 symbols, mix of upper and lowercase characters and digits). Change it at least once in a month, if you are that concerned about your wifi privacy.

2. If your router supports it, create two wifi routes - no-password-protected network w/o internet connection (or 64kbit limit) - it is often called guest network or virtual interface in router configurations, and if password protected - full internet access (keep p1 in mind ofc).

3. Use MAC whitelist filtering. It really doesn't help, but can withstand some of those cracking apps that does not support MAC masquerading.

Cracking people's Wifi is illegal. If you live in America, change your Wifi name to "FBI Surveillance" or something of the likes, scare the crap out of him. He won't bother q:

"He showed me an app that he uses to crack the WiFi key and connect within few minutes."
WEP with a weak password? Because otherwise i can't see it working this fast.

there is nothing to stop wifi being hacked apart from thin air, literally
turn it off is the only way

Being a "white hat" security specialist, the app that you linked too attempts to connect via WPS, if you can switch this feature off on your router, then change your wifi password, your neighbor would be screwed over and out of luck.

I prefer a whitelist MAC instead of a blacklist MAC, with or without a good password.
This way you can put all your device to the list and don't care anyone going to steal your wifi.

And either the app is crap, or my netgear nighthawk R7000 was good enough to block it, I was not able to connect to any of my two private SSID's - and neither of my two password protected "Guest" wifi (named Homeland security and Immigration investigations - just for giggles)

Consider a new router?

Disable WPS ("WiFi Protected Setup") on your router. If you're not sure how to do this, you can google for your router's model; most likely, you will need to open a browser and go to 192.168.0.1 or 192.168.1.1 and enter the router's administration username and password. (Those will be different from any other passwords you use, and different from the WPA password. If you haven't changed them, they should have default values, like "admin" and "admin" or somesuch. Also, change that password, obviously.)

Then navigate the menu that appears and figure out a way to disable WPS / WiFi Protected Setup. It's insecure and is what most people use to attack WPA. If he's breaking in a few seconds, he probably knows your WPS key, which often can't be changed (and even if you could, he could just crack it again.) You need to disable WPS entirely.

Obviously, after doing this, you need to change your WiFi password, since he knows it (the WPS key can be used to retrieve it.) Don't bother changing it until you've disabled WPS, he'll just get the new password if you do. And if you've reused the password anywhere else, you need to change it there, too, in case he gets angry and starts trying to log into your other stuff.

Other people have made good suggestions about how to administer your network so I won't say anything about that.

I just wanted to say that you should do something to your neighbor. Here are some suggestions:

1. Punch him in the dick.
2. Use a script/software to make it so that for him all sites resolve to meatspin.
3. Hang out at his place for drinks and get him passed-out drunk. After he passes out, undress him, lay him on his bed naked except for a funky pair of shoes he owns that you never see him wear. Take a picture. Then hide the shoes somewhere in his house where he is unlikely to find it for weeks or months. Some other night, print out a bunch of "Lost possession" flyers (oscuring his nudity but being sure to leave enough identifying information so that it's easy to tell who it is) and tape them to trees and utility poles and whatever like someone might do for a lost cat. "Have you seen my shoes? They were rarely worn but greatly cherished. This is the only picture I have of myself wearing them. Cheers. Contact me if you have seen them or you own a pair you are willing to lend occasionally. [contact info]."
4. Do all three.

The others gave you good tips, listen to them. The only thing I can add is the simplest trick - turn off your router when you aren't using it. It'll make cracking the password a real pain in the ass and even if someone does it, they won't be able to leech you whenever they want, so they'll move to someone else.