IP Calculator is a free Android application developed by Juboraj Sarker, designed to help network specialists calculate network addresses, subnet masks, first and last usable hosts, and broadcast addresses from a given IP. The app is user-friendly and works well with or without CIDR value.

One of the most significant features of IP Calculator is that all calculations have been justified by a network specialist, ensuring that it is reliable and accurate. Moreover, the app shows the full calculation in both Decimal and Binary format, making it easier for users to understand and evaluate.

Overall, IP Calculator is an excellent utility tool for network specialists who need a reliable and comprehensive calculator to perform network calculations. However, the app does not offer any option to contact the developer or provide feedback, which could have been a useful addition to improve the app in the future.