This app provides square footage and volume calculations for footings, walls, slabs, and cylinder columns. Inputs are feet and inches with volume results in cubic yards. My father, concrete mason, carried around a calculator and concrete ruler in addition to all his construction tools to measure basic concrete construction calculations his whole career. This app was created to lighten his number of tools and remove the burden of manually calculating basic algorithms all in one place. Please let me know if you encounter any issues or have any issues with the app, it is my intention to make this app as simple and convenient as possible to allow anyone with basic square footage and volume needs a reliable tool. Thanks!