Mather — Open Source Calculator App

Mather is a powerful, simple-to-use, no BS expression-based computation engine. In addition to basic calculator arithmetic, it supports all of the following. Powered by Math.js. * Variables * User-defined functions * Easily-accessible math constants, e.g. 'pi' * Complex math expression evaluation * Trigonometric functions * Unit conversions (and more general unit arithmetic) * Complex numbers * Matrices * and more