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Last Updated: 4/27/2026

Flutter Overview

Flutter is an open-source UI software development kit created by Google. It is used to develop cross-platform applications from a single codebase for mobile, web, and desktop platforms.

Key Features

Cross-Platform Development

Flutter allows developers to build applications for Android, iOS, web, Windows, macOS, and Linux using a single codebase. This significantly reduces development time and maintenance costs.

Hot Reload

One of Flutter’s most popular features is hot reload, which allows developers to see changes in their code reflected in the app almost instantly, without losing the current application state.

Widget-Based Architecture

Flutter uses a widget-based architecture where everything is a widget. Widgets are the building blocks of a Flutter app’s user interface, and they can be combined to create complex UIs.

Rich Widget Library

Flutter provides a comprehensive set of customizable widgets that follow both Material Design (Android) and Cupertino (iOS) design guidelines, ensuring native-like experiences on both platforms.

Programming Language

Flutter uses Dart as its programming language. Dart is also developed by Google and is optimized for building user interfaces. It offers features like:

  • Strong typing
  • Null safety
  • Asynchronous programming support
  • Just-in-time (JIT) and ahead-of-time (AOT) compilation

Performance

Flutter apps compile to native ARM code, which provides excellent performance. The framework’s rendering engine, Skia, draws UI components directly, ensuring smooth animations and transitions at 60fps or 120fps on capable devices.

Many well-known applications use Flutter, including:

  • Google Ads
  • Alibaba
  • BMW
  • eBay Motors
  • Philips Hue

Getting Started

To start developing with Flutter:

  1. Install the Flutter SDK
  2. Set up an editor (VS Code or Android Studio recommended)
  3. Create a new Flutter project
  4. Run your first app with flutter run

Community and Resources

Flutter has a vibrant community with extensive documentation, packages available on pub.dev, and active support forums. The framework continues to evolve with regular updates and new features.