There are several reasons why Flutter is a popular choice for mobile application development:

Single Codebase for Both iOS and Android: With Flutter, developers can build mobile apps for both iOS and Android platforms using a single codebase, which means that the development process is faster, more efficient, and cost-effective.

Fast Development: Flutter offers a "hot reload" feature that allows developers to see the changes they make to the code in real-time, without having to restart the app. This feature speeds up the development process and helps developers to fix bugs quickly.

High Performance: Flutter's widgets are designed to run at 60 frames per second, providing a smooth and responsive user experience. The framework also uses AOT (Ahead of Time) compilation, which compiles the Dart code into native machine code, resulting in fast and efficient apps.

Rich Widgets and Tools: Flutter provides a rich set of pre-built widgets and tools that simplify app development and help developers create beautiful and responsive UIs. These widgets and tools enable developers to create high-quality apps quickly.

Large and Active Community: Flutter has a large and active community of developers, which means that developers can get help and support from the community if they encounter any issues or problems during the development process.

In summary, Flutter is an excellent choice for mobile application development because it offers fast development, high performance, a single codebase for both iOS and Android, a rich set of widgets and tools, and a large and active community of developers.