Wolfram Alpha is described as «»Computational Knowledge Engine» — different from a search engine, it answers factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer» and is a very popular Calculator in the education & reference category. There are more than 50 alternatives to Wolfram Alpha for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Mac. The best alternative is fxSolver, which is free. Other great apps like Wolfram Alpha are Mathematica, Symbolab Math Solver, Insect and Soulver.Wolfram Alpha alternatives are mainly Calculators but may also be Programming Languages. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Wolfram Alpha.
