Calculus is a mathematical theory used to calculate the rate of change of a quantity, particularly the change in the value of a function over time. It is one of the most commonly used methods of finding the area under a curve and is a fundamental tool in many fields of mathematics and science.

This app has been designed for students who are taking a calculus course. It contains a lot of material that is very useful in the classroom and for homework. 

The material in this app includes functions, graphs, limits, derivatives, integrals, differential equations, sequences and series, power series, and many more.

This is the most comprehensive and best app for students who are taking a calculus course.