Wifikill app can disable internet connection for a device on the same network.
So if someone is abusing the internet wasting precious bandwidth for a personal use or using too much of data you could just kill their connection and stay happy with full bandwidth and high speed just for yourself.
This app can only be worked on Android Devices 4.0+. We at startappsforpc highly recommend to try this app once. It has friendly features and is easy to use. This app keeps on updating and new features ill be added soon.