IP Network Calculator is a free Android application developed by Def-Logix Inc. that helps users set up routers and addresses on IP networks. This program provides real-time updating and copy/paste support, making subnetting and networking easy and fast.

The application features a single slider that acts as a selector for the CIDR, netmask, and the number of hosts needed in a subnet network. This tool is useful for subnetting a router in tandem with an Android web browser or for educational purposes. The program emphasizes education by providing real-time updates of the network, broadcast, netmask, first and last address of the subnet, and the number of usable IPs in different formats such as dotted-decimal, hexadecimal, octal, decimal, binary, and decimal. It also comes with basic notes.

The output updates in real-time as users change values and move the slider to adjust the netmask/mask bit. Touching the output will cycle through several different formats, while long presses will enable menus for copying to the clipboard. The program is fully functional for IPv4 networks and does not require any special permissions or display ads. Additionally, it solves the common problem of the lack of a dot on the number keyboard. For any inquiries, please contact the developer at