Flutter

Flutter has been recognized by Google to develop cross-platform mobile applications based on a single codebase; this was designed particularly around using the Dart programming language.

An engine written from scratch endows Flutter with native performance by using its own rendering, while React Native draws on the use of native building blocks from time to time.

In Flutter, everything is a widget. A widget includes the app's UI components such as buttons, text, and layouts, and defines how the app looks.

Dart is the programming language used in Flutter for building apps. It is fast, easy to learn, and, above all, Dart gives mobile applications high performance.

Stateless widgets do not change their appearance once built; stateful widgets can change their appearance in response to state changes within the app.

Flutter has its rendering engine, Skia, which draws the UI directly on the screen, contributing to uniform performance across platforms while not drawing on the use of native UI components.

A Future is a way in Flutter to represent a value that is not available yet, for instance, an API response. Futures allow writing asynchronous code: code that deals with data that is not immediately available.

Hot reload makes changes to the UI right away with no loss of app state, while hot restart will restart the app, clear the state, and recompile the code.

Just like Provider, Riverpod, Bloc, or setState, Flutter provides state management methods to help a developer store, retrieve, and keep data up to date with UI changes in an app.

Performance can be improved by reducing widget rebuilds, using const constructors, implementing lazy loading techniques, and reducing overdraw while managing widget layouts as well as rendering efficiently.