The app differentiates and integrates user given polynomial that can also have fractional coefficients. The derivative and the integral can be fetched to be further edited. If the polynomial (also derivative and integral) doesn't fit to the screen the polynomial can be scrolled. Any term of the polynomial can picked up to be edited by touching it for 1.5 seconds. The polynomial can also have a constant as a term.

In addition the app graphs the polynomial(s).

The graphs are saved into Pictures folder with run-time permission asking in later Android versions.

The graphs can be zoomed.

Some instructions:
* Touch for 1.5 seconds on the X to get into constant mode (the X disappears). Touch for 1.5 second on constant and coefficient (X term) appears
* Touch for 1.5 on a term of a polynomial and it appears to be edited
* Tap at the bottom of the X to enter fractional coefficient
* Tap on the OK button to add a term to the polynomial