Combo Calculator is a Education::Mathematics software developed by 1888softwaredownloads.com. After our trial and test, the software was found to be official, secure and free. Here is the official description for Combo Calculator: Full featured free calculator providing all the essential features of a calculator and more. The software handles all basic and advanced features required by most users and includes several advanced features within a scientific calculator. It evaluates all major mathematical expressions and supports various trigonometric functions, exponential function, logarithms, factorials, etc. Round and cube root are the special features of this calculator. you can download Combo Calculator 1 free now.