GeoGebra Classic is described as 'Free online apps bundle from GeoGebra: get graphing, geometry, algebra, 3D, statistics, probability, all in one tool!' and is a Calculator in the education & reference category. There are more than 25 alternatives to GeoGebra Classic for a variety of platforms, including Web-based, Android, iPhone, iPad and Android Tablet apps. The best GeoGebra Classic alternative is Wolfram Alpha, which is free. Other great apps like GeoGebra Classic are Mathematica, fxSolver, Mathpix Snip and Photomath.
GeoGebra Discovery is an experimental version of GeoGebra. It contains some bleeding edge features of GeoGebra that are under heavy development and therefore not intended for every day use yet, so they are not included in the official GeoGebra version.
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