RF Engineer is a useful tool for RF engineers to estimate coverage radius. It is a simple home-made tool that calculates the radius from half of the antenna beamwidth in each direction of the downtilt angle from the height of the antenna. The app is available on the Android platform and is free to download.

The app is specifically designed for RF engineers who work with antenna systems. It provides a quick and easy way to estimate the coverage radius of an antenna system, making it a useful tool for planning and designing radio frequency networks. The app is easy to use and provides accurate results, which can be essential for the success of any RF project.