This application is very good tool for student , engineer and technical people to get all information for the cone to make it by using flat steel , aluminum or copper sheet...etc By this app you can get :- 1- Cone angle as the diameter and height are given. 2- Detailed drawing for the flat sheet needed to make this cone . 3- The area of this flat sheet of the cone. As a great improvement we add the following features 1 - The flat pattern becomes dynamic and real. 2 - Adding sheet thickness. 3 - Adding the cylinder. 4 - Export the flat pattern file at your mobile 5 - Export the flat pattern as picture (jpg) then you can print it. 6 - Export the flat pattern as dxf file , then you can open it by any CAD program like Acad. 7 - You can use the dxf file to cut the sheet by laser machine or CNC machine.