A Flutter application is a cross platform mobile app built using Google’s open source framework Flutter, which allows developers to create apps for iOS, Android, and other platforms using a single codebase. Powered by the Dart programming language, Flutter delivers high performance, smooth animations, modern UI components, and a user experience close to native apps.

Key advantages of Flutter include hot reload, faster development cycles, cost efficiency, built in widgets, expressive UI design, and high performance rendering. Because of these strengths, Flutter applications are ideal for startups, businesses, and enterprise projects that want to launch quickly on multiple platforms while maintaining high quality.