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October 11, 2023

Flutter: Building cross-platform apps with ease

Cross-platform app development has emerged as a game-changer, allowing developers to craft applications that seamlessly run on various operating systems like Android, iOS, and more, all from a single codebase. One of the frameworks used for this purpose is Flutter. How does it work, and what are its main advantages?

When you take a look at the popularity of various cross-platform frameworks, Flutter is undisputed number one, with popularity growing very rapidly (46% in 2022):


There is a reason for this framework’s popularity. Flutter is flexible and simply nice to work with. In this post, we want to talk about how Flutter works and why you should consider it as a good solution for your project. Let’s get right to it!

How Flutter works

Flutter is a free (open-source) software framework made by Google. It helps make apps for mobile, web, and desktop all using the same code. With Flutter, you can write code in Dart and use lots of ready-made parts to create good-looking and interactive apps.

Flutter’s advantages

A single codebase is definitely the most important advantage of Flutter, but it's not the only one. What makes it so innovative, both in the native and cross-platform technology markets?

Hot reload

It is a powerful feature that allows developers to make real-time modifications to the codebase and instantly see the results in the running application. When a developer makes changes to the Flutter source code (such as modifying UI elements, layout, styling, or logic), the changes are injected directly into the running application, preserving its state.

This process is incredibly fast and efficient, providing a seamless development experience. As soon as the changes are saved, the application is updated in a fraction of a second, reflecting the modifications without the need to rebuild or restart the entire app. This rapid feedback loop accelerates the whole process, enabling developers to iteratively fine-tune and debug their apps on the fly.

Hot reload is particularly beneficial for UI development and experimentation, as designers can tweak the design elements and observe the impact instantly. It also aids in debugging and quickly identifying issues, improving productivity and collaboration within development teams.

Expressive user interface

Flutter’s UI capabilities stem from its extensive collection of customizable widgets and flexible UI framework. These widgets can be easily tailored to match a wide range of design requirements, making it possible to create visually stunning and unique user interfaces.

The Flutter framework offers a vast array of pre-designed, ready-to-use widgets for common UI components, including buttons, text fields, lists, navigation elements, and more. Developers can customize these widgets to fit their app's branding, style, and user experience, ensuring a consistent and cohesive look and feel across the application.

Beyond basic widgets, Flutter allows for the creation of complex and intricate UI designs by combining smaller widgets, incorporating animations, and implementing smooth transitions. The framework's composition model allows developers to build elaborate UIs by nesting and combining widgets in a structured and intuitive manner.

In addition, Flutter's support for custom animations and rich graphics enables the development of dynamic and interactive user interfaces. Animations can be seamlessly integrated into the UI, enhancing the overall user experience and engagement.

Native performance

This advantage refers to Flutter’s ability to achieve near-native performance levels on both Android and iOS devices. When a Flutter app is compiled, the code is transformed into native ARM (Advanced RISC Machine) code, which is the instruction set used by most mobile devices. This compilation allows the app to run directly on the device's hardware, delivering high performance and optimal responsiveness.

Unlike some cross-platform frameworks that rely on interpreters or bridges, Flutter's compiled-to-native approach eliminates the need for a JavaScript bridge or other intermediate layers. This results in faster execution of code and a more efficient utilization of the device's resources, leading to a smoother and more responsive user experience.

Flutter's native performance is crucial for applications that demand high performance, such as games, multimedia, or apps with complex animations. It ensures that the application can handle intensive operations and deliver a fluid and snappy user interface comparable to apps built using traditional native development approaches.

Community and ecosystem

Flutter boasts a vibrant and rapidly growing community, which plays a pivotal role in shaping and advancing the framework. The community consists of developers, designers, and enthusiasts from around the world who actively contribute to the ecosystem. They engage through forums, social media, developer meetups, hackathons, conferences, and online communities to share knowledge, collaborate, and support one another.

One of the hallmarks of the Flutter community is its inclusivity and helpfulness. Developers often participate in discussions, answer questions, and provide guidance to newcomers and experienced developers alike. This collaborative environment fosters the exchange of ideas, best practices, and solutions to common challenges.

The ecosystem surrounding Flutter is vast and diverse. It includes a plethora of packages and plugins available through, Flutter's official package repository. These packages extend Flutter's functionality, offering solutions for everything from UI enhancements to integrations with various APIs, databases, and services. The broad range of packages accelerates development by providing pre-built solutions to common development needs.


With Flutter, developers can create applications not only for mobile platforms like iOS and Android but also for the web and desktop. This versatility is a significant advantage, as it allows businesses to reach a broader audience without the need to write and maintain separate codebases for each platform.

The versatility of Flutter is further highlighted by its support for a wide range of development workflows and architectures. Whether developers prefer imperative programming, reactive programming, or a combination of both, Flutter can accommodate different styles, making it adaptable to various development preferences and project needs.

Furthermore, Flutter's compatibility with different development environments and integrated development tools add to its versatility. Developers can use popular code editors like Visual Studio Code, Android Studio, IntelliJ IDEA, or even a simple text editor, providing the flexibility to work in an environment they are comfortable with.

What is Flutter’s future?

In conclusion, Flutter stands as a testament to the future of cross-platform app development. Its ability to unify platforms, coupled with its remarkable performance and versatility, positions it at the forefront of technology. As it continues to evolve and mature, Flutter is poised to redefine the way we envision and build exceptional applications.