Simple Graphing calculator app for Android. It was made as an university project in 2016
The Java code and the XML layout can be found in the folder app/src/main/.
The file GraphCalc.apk is the compiled app and works with every android device with Android 4.1 or higher. In portrait mode, the calculator has basic functions such as addition, subtraction, multiplication, etc.
In landscape mode, more advanced functions are available, like trigonometric functions, factorial (gamma function), and erf function (error function).
By clicking on the graph icon right in the top bar you can access the Graphing Mode. Write the function you want to display and render it using the graph button that appeared where the equal symbol usually is.
In the render window, it is possible to zoom using pinch-to-zoom and it is also possible to reset the domain in which the function is calculated.