In this article, we are going to learn how to make simple Calculator android and ios application using flutter. For this purpose we are using two library which are given below. material.dart math_expressions.dart First library is used in any flutter application for GUI purpose, and second one is used for maths expression solve. In pubspec.yaml file you have to add following library. dependencies: flutter: sdk: flutter # The following adds the Cupertino Icons font to your application. # Use with the CupertinoIcons class for iOS style icons. cupertino_icons: ^0.1.3 math_expressions: ^2.0.0 Now click on pub upgrade on upper side. For…