This app can differentiate and integrate functions for you. It has many identities and rules in it. It covers rules like Power rule, Chain rule, Product rule, Quotient rule, sum and difference rule, Trigonometric functions and inverse trigonometric functions. It can also integrate for you. The whole app is created in soft ui for making your eyes relax. The whole app is free to download with no additional charges. And also the whole app is open source at https://github.com/hemish11/kalqlus. It also provides the output in proper mathematical format so that you can get proper understanding of it. You can also change form differentiation to integration and the function that you typed will stay there.