uk.co.znder.subnetcalculator is a free Android app designed for IT professionals and students who need to divide networks into smaller, more efficient subnets to meet host requirements. It also features a regular subnet calculator to discover the available hosts, address range, network address, and broadcast address of a given IPv4 network with an easy slider to expand or shrink networks. The app is equipped with Material Design, which makes it visually appealing and user-friendly.

In addition to the standard features, the app offers an automatic dark/light mode that adjusts to the user's preferences. This feature ensures that the app is easy on the eyes and suitable for use in any lighting environment. The app is straightforward to use, and its sliders make it easy to adjust the network size. It is an essential tool for network administrators and students studying networking.