Let's say you gave your Wi-Fi password to your neighbor a while back, under the assumption that they'd only use it while they were at your house sharing stuff via Chromecast. But now, your connection is slower than it normally should be, and you have this sneaking suspicion that the dude in apartment 3C is flat-out piggybacking off of your home network.

download this app
https://play.google.com/store/apps/details?id=pixel.com.netcut&hl=en