RedCrab is a scientific calculator with a full screen formula editor. Mathematical expressions can be entered in a window similar to a piece of paper. The calculator's editor supports the entry of complex algebraic equations like fractions, square roots, exponents, etc. for technical and scientific applications.

Several mathematical functions can be written on the same page. Results from one expression can be carried over to the next task. You can save and load the formulas to create a formula library and complex tasks can be explained visually by importing drawings in bitmap format.

Note: a shareware version with additional features is also available.