**RedCrab** is an accurate mathematical expression calculator comprising a full-screen editor.

With simplicity as its key feature, this useful expression calculator supports an easy to learn, comfortable and powerful interface. This unique calculator is integrated with a full-screen editor where the mathematical expressions are not typed in a typical command line, but can be entered in the editor window. The fully-functional interface provides support for – the entry of complex algebraic equations with fractions, square roots, exponents, and so on for technical and scientific applications. It also includes features like: the ability to write several mathematical functions on the same page, ability to carry over results from one expression to the next task, ability to save and load the formulas to create a formula library, and much more.

**RedCrab**, can also comprehend complex tasks visually by importing drawings in bitmap format.