A free program for Android, by Leon Zhang.

With the WiFi Router Settings mobile application, you will be able to modify and configure your home network’s settings without any hassle. It is compatible with most Android devices and can be downloaded and installed for free. Once it is launched, it will look for your router’s IP and link to it in just a few seconds. Or, if the automatic connection does not work, you can instead input the IP into the app on your own.

As soon as you get the app set up and running, you will gain access to vital information about your home network, such as the modem’s IP address, DNS values, gateway, SSID, and more. Aside from that, the app will let you edit basic and advanced settings, including changing your network’s password.