A free app for Android, by William Jockusch.

Free Graphing Calculator 2 is a powerful, flexible, and easy-to-use graphing calculator for Android. It is designed to make life easier for those who need to perform complex arithmetic calculations.

It has a simple and intuitive user interface that allows users to enter values, add or subtract them, and then calculate the final value. It also provides a lot of flexibility for the user, as they can easily change the graph type and choose from a variety of functions.

It also provides a lot of help and guidance to the user, so they don’t need to be afraid of performing the calculations wrong.