Mathomatic is described as 'Free, portable, general-purpose Computer Algebra System (CAS) that can automatically solve, differentiate, simplify, combine, and compare algebraic equations, perform standard, complex number, modular, and polynomial arithmetic, etc' and is an app in the education & reference category. There are more than 25 alternatives to Mathomatic for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best Mathomatic alternative is SageMath, which is both free and Open Source. Other great apps like Mathomatic are Mathematica, MATLAB, Maxima and Maple.