GraphCalc is described as 'all-in-one solution to everything from everyday arithmetic to statistical analysis, from betas to Booleans, from cubes to calculus, from decimals to derivatives' and is an app in the Education & Reference category. There are more than 25 alternatives to GraphCalc for a variety of platforms, including Windows, Mac, Online / Web-based, Linux and Android. The best alternative is Wolfram Alpha, which is free. Other great apps like GraphCalc are Qalculate! (Free, Open Source), Mathematica (Paid), Windows Calculator (Free, Open Source) and Desmos (Free).
Is a powerful, easy-to-use, equation plotter with numerical and calculus features: Win32 screen shot. Graph Cartesian functions, relations, and inequalities, plus polar, parametric, and ordinary differential equations. Up to 999 graphs on screen at once.