Network Calculator is a free Android application developed by EONSOFT. It is a simple and easy-to-use tool that helps users calculate various network parameters. The app requires the user to enter the IP address to calculate the following information: CIDR, subnet mask, number of hosts, wildcard mask, broadcast, start IP, and end IP.

The interface of the app is straightforward and user-friendly. Users can easily navigate through the app and enter the required information. The app provides accurate results and is a useful tool for network administrators, IT professionals, and students studying networking. The app is available for free and can be downloaded from the Google Play Store.

Overall, Network Calculator is a useful tool for anyone who needs to calculate network parameters. It is easy to use, provides accurate results, and is available for free. However, it lacks advanced features that some users may require.