My wifi router supports only one device to connect . Is there any way or hack or app to avoid others connecting to wifi ..or just me connect forcefully by kicking out others within the android ..dont want to mess with router ..pls help if u got any ways to do it from android device itself.
None of what you are referring to is needed. All you need to do is password protect your modem/router. Once it has a password, that you don't tell anyone that you don't want using it, then no one can access your WiFi without that password. Just make sure it is a good one and not one someone could easily guess.
You will need access to the devices settings, usually done via computer accessing the modem/router.