This application of Editorial Editex S.A. It represents any function introduced by keyboard, giving us insight on its continuity, extremes and growth intervals, among other things. It includes the following sections:
 - Theory: contains a document in PDF format with a summary of contents.
 - Practice: allows the graphic representation of any function introduced, as well as communicate if it is continuous at one point, if it is increasing / decreasing or concave / convex in it, or if it is subject to a maximum / minimum / turning point.
 - Test: allows you to perform a self-assessment with 10 test-type exercises collected randomly.
 - Problems: this section is intended to solve problems, one solved by way of example and another 5 proposed to the user.