What is Flutter exactly?

Flutter is an open source framework for developing high-quality, high-performance mobile applications for Android and iOS devices. It gives you a simple, powerful, efficient, and easy-to-understand SDK for writing mobile apps in Dart, Google’s own programming language.

Dart is Flutter’s object-oriented language that compiles into native code using Ahead-of-Time compilation techniques. This significantly reduces the time it takes for the app to start up.

Features:

• Fast Development
• Expressive and Flexible UI
• Native Performance

The reactive development architecture is followed by Flutter, but with a twist. The most important thing to understand about reactive programming is that it automatically refreshes UI content when variables in the code are updated.