Charts is a general charting library, currently enabled for the Flutter mobile UI framework.
See the online gallery for supported chart types and examples of how to custom components of the chart.
Note: This is not an official Google product.
charts_common
A common library for charting packages.
charts_flutter
A charting package for Flutter, supporting both Android and iOS.
Credit (github url) : https://github.com/google/charts
Next Article : https://flutterappdev.com/2019/01/31/build-a-calculator-app-in-ios-and-android-with-the-same-code-flutter-app/