কঠর হসব is a free utility application designed for Android users to facilitate rapid calculations of round and chopped wood measurements in cubic feet. The app allows users to input measurements for round wood using dimensions in inches and feet, while providing essential waste and usable wood percentage information, which is 21.5% waste and 78.5% usable.

The application also offers features for calculating chopped wood measurements by requiring inputs for width, thickness, and length in inches or feet. With functionalities that include a timber calculator, log calculator, and wood measurement tools, this app serves as a comprehensive solution for users needing precise wood calculations for various purposes, including construction and woodworking.