Flutter

Flutter is a cross-platform SDK for Android, iOS and Web-Apps, which was released in 2017.

It's purpose is to provide a simple way to create apps with standard functionalities and design for Android and iOS, without compromise in speed.

It utilizes a modern language (Dart), that allows for fast coding.
Unusual, layouts are programmed programmatically (no markup).

Auth with Firebase
Gallery
Layouts
Navigation Routes
Navigation 2.0
Widgets as modules
State management
Card examples
Custom Icon in Custom Fonts
Custom Fonts Generator
Repair SVG (compound path)
Dartpad
CustomMultiChildLayout

Ephemeral vs App State

In summary, there are two conceptual types of state in any Flutter app. Ephemeral state can be implemented using State and setState(), and is often local to a single widget. The rest is your app state. Both types have their place in any Flutter app, and the split between the two depends on your own preference and the complexity of the app. flutter.dev

Commands