In this tutorial we will create a calculator application with App Inventor that does the following 4 operations: sum (+), product (*), subtraction (-) and division (/).
We propose to make a small simple calculator, with the following visual:
To program the application, App Inventor proposes to use The Space Blocks which allows to create a program in the form of a block diagram. Very simple to use but requires some programming logic.
Here is the calculator program realized in the Blocks space of the App Inventor: