Migrating from Ionic to Flutter? Here Is What You Need to Know 
Mobile app upgradeFlutter

Migrating from Ionic to Flutter? Here Is What You Need to Know 



The technology stack you opt for in your project can be the deciding factor of its success. With so many options in the market, it’s easy to get overwhelmed. However, the transition from Ionic to Flutter is one particular topic that’s been gaining popularity.

Ionic, a reliable industry leader, has powered countless applications with its web-centric nature and familiarity with web languages. But is there a better way? Flutter, a newcomer backed by Google, is making waves with its unique use of Dart as a core language and custom rendering engine for creating exceptional user interfaces. 

In this comprehensive guide, we’ll unpack the intricacies of both platforms and provide an in-depth analysis of their key features, core philosophies, and how the decision to transition from Ionic to Flutter can impact the performance, efficiency, and overall success of your mobile applications. Whether you’re a seasoned developer or a business leader seeking to understand the implications of this migration, this guide is for you.

So, gear up for an enlightening journey of discovery as we delve deeper into the world of Flutter and Ionic. We’ll equip you with the knowledge and insights to make informed decisions that will take your app development to the next level.

Understanding Flutter and Ionic

When it comes to mobile app development, Flutter and Ionic stand out as two significant players. While both platforms have unique strengths and philosophies, their popularity among businesses and developers makes them worth understanding.

Flutter, a product of Google, is a more recent player in the field. It’s a UI SDK that’s freely available, allowing developers to create apps across multiple platforms from a single codebase. Flutter’s Dart programming language offers strong capabilities for app development, and its custom rendering engine allows developers to create highly customized UI designs with relative ease.

Ionic, on the other hand, has been around since 2013 and has established itself as a stalwart in the field. With its open-source platform designed for cross-platform mobile app development, Ionic leverages web-based technologies. By applying the „write once, run anywhere” philosophy, Ionic allows developers to create apps that run natively on multiple platforms with minimal code modifications. Its reliance on familiar web technologies makes it a popular choice for developers with a web development background.

Understanding the origins, key features, and value of each platform is essential to make an informed choice about which one to use for your project.

Core Philosophies of Flutter and Ionic

Flutter and Ionic represent two of the leading cross-platform frameworks for development. Their guiding philosophies shape each platform’s design and functionality and what developers can achieve using them.

Flutter prioritizes customization and performance, offering an immersive developer experience centered around a rich set of pre-designed widgets that can be extended and customized to develop truly personalized user interfaces. In addition, Dart programming language allows for ahead-of-time (AOT) compilation and high performance.

On the other hand, Ionic’s strategy is focused on efficiency and convenience for developers. The „write once, run anywhere” approach allows developers to craft applications for multiple platforms using a single codebase and web development technologies.

Both philosophies have unique advantages and are suited to different needs. Flutter is recommended for apps requiring complex, custom user interfaces and high performance. On the other hand, Ionic is a go-to choice for quickly developing simple, cross-platform apps.

Understanding the core philosophies behind Flutter and Ionic is crucial to making the right choice for any development project. Mastering these platforms enables developers to build exceptional apps with the best-suited tools for the job.

How Flutter Works

Flutter operates by harnessing the unique strengths of its two core components: Dart and a custom rendering engine. 

At the heart of Flutter lies Dart, an object-oriented programming language. However, unlike other languages, Dart provides both just-in-time (JIT) and ahead-of-time (AOT) compilations. JIT compilation (compiling code during runtime) is ideal for developers because it enables quick hot-reloading during development. Meanwhile, AOT compilation (compiling code before runtime) optimizes performance on the user end with short startup times and smooth animations. 

Dart is just one layer of Flutter’s innovative stack. What sets Flutter apart is its custom rendering engine. While traditional platforms rely on either platform widgets or web views, Flutter utilizes its own rendering engine written in C++. Flutter interfaces with platform-specific Software Development Kits (SDKs) and sends the Dart code to the platform’s canvas. This translates to Flutter running seamlessly on any platform that supports a canvas. 

By introducing its own rendering engine, Flutter now has more control over the rendering process, resulting in customized, highly-complex UIs. Moreover, Flutter UI is declarative, requiring less technical expertise from developers to create stunning UIs. Rather than telling Flutter how to build a UI, developers tell Flutter how the UI should look, and Flutter will figure out how to make it. 

This approach, combined with Flutter’s rich set of pre-designed widgets, allows developers to create complex, beautiful UIs with relative ease. Plus, Flutter’s UIs perform flawlessly across different platforms. No matter what platform you run your app on, Flutter’s got your back.

How Ionic Works

Ionic and Flutter both offer great mobile app development options, but their approaches differ significantly. While Flutter is based on the Dart programming language, Ionic takes a different approach. It embraces the power of the web, using widely used web technologies like HTML, CSS, and JavaScript as its core building blocks. 

At the heart of Ionic’s architecture are „web views,” which are essentially stripped-down web browsers embedded within native app shells. This approach allows developers to build web applications that run inside native web-view containers, enabling cross-platform compatibility with a single codebase. It also allows Ionic developers to take advantage of the „write once, run anywhere” philosophy.

One of the key features of Ionic is its use of web standards-based UI components. These pre-built, customizable elements can be used to construct an app’s user interface, providing a consistent look and feel across different platforms. 

While Ionic’s web-based approach offers certain advantages, such as ease of development and cross-platform compatibility, it also has inevitable trade-offs. For example, performance and access to native APIs can be limited compared to platforms like Flutter, which take a more native approach. But with careful consideration and development, an Ionic app can still provide an excellent user experience.

Overall, Ionic’s approach to mobile app development is both innovative and powerful. It provides a unique and effective way for developers to build sturdy, cross-platform applications that users will love.

Need help?

Let us take the whole app development process off your shoulders

Comparison of Flutter and Ionic

Flutter and Ionic differ significantly in terms of performance, architecture, and future orientation. Though both frameworks are efficient in cross-platform app development, making the right choice depends on several decisive factors. In this chapter, we’ll explore these factors to help you choose the ideal platform for your project. So, buckle up and get ready to boost your development game.


  • With its Dart language and custom rendering engine, Flutter tends to offer superior performance. The AOT compilation of Dart allows Flutter to communicate directly with the native code without needing a JavaScript bridge, resulting in faster startup times and smoother animations.
  • Ionic, on the other hand, relies on a web view for rendering, which can lead to slower performance than Flutter. However, for most standard applications, this performance difference may not be noticeable to the end user.

Architectural Differences

  • Flutter uses a custom rendering engine and provides various customizable widgets, allowing developers to have complete control over the look and feel of their apps. Flutter’s architecture is based on the reactive programming model, where the UI is a function of the current app state.
  • Ionic uses a web view for rendering and leverages web technologies for development, meaning that Ionic apps are essentially web apps running inside a native container. Ionic’s architecture is based on Angular (though it supports other frameworks, too), a popular web development framework that uses a component-based architecture.


  • Flutter, backed by Google, has been gaining rapid popularity. Its performance benefits, combined with the ease of creating custom UIs, make it a good choice for future mobile app development. In addition, Google’s commitment to Flutter’s development suggests a strong future for the platform.
  • Ionic, while older, continues to be a reliable choice for cross-platform app development, especially for teams with a strong background in web development. Its use of standard web technologies means that it’s likely to remain compatible with future web standards.

Flutter is the top-performing mobile app development platform on the market. Its powerful Dart language and custom rendering engine offers smooth, fast performance and a superior user experience. In comparison, while Ionic is a dependable choice for standard applications, it simply can’t match Flutter’s speed and responsiveness.

One of Flutter’s stand-out features is its highly customizable widgets and reactive programming model, which give developers a high level of control over their apps. On the other hand, Ionic’s web-based component architecture doesn’t provide the same level of customization and control.

Looking ahead, Flutter’s future is looking bright. As a product of Google, it has already gained widespread adoption and is set to grow even more. With its exceptional performance and ability to easily create custom UIs, Flutter is a highly promising choice for mobile app development.

While both platforms have their merits, Flutter’s superior performance, greater control over UI design, and promising future make it a compelling choice for those looking to stay ahead of the curve in mobile app development.

If you’re interested in learning more about the differences between various app development frameworks, you might find our post on 'React Native Vs Flutter’ enlightening. Dive into the comparison to make an informed decision for your next project.

Migrating from Ionic to Flutter

Migrating from Ionic to Flutter is often a no-brainer for developers prioritizing superior performance. Flutter’s custom rendering engine and Dart coding language brings the speed and efficiency that Ionic’s web-view-based rendering may struggle to match. The result is a faster app with smoother animations and a more responsive user interface – all critical components of an exceptional user experience.

But that’s not all. Flutter’s built-in widgets make it easy to create customizable, visually stunning user interfaces in less time. Combine that with the powerful „hot reload” feature that allows developers to see the effects of their changes immediately without losing their place, and you have a development tool that can help you hit your milestones quicker.

Ready for more? If Flutter’s capabilities have piqued your interest, don’t miss our post „OPTIMIZING PRODUCTIVITY IN MOBILE APP DEVELOPMENT WITH FLUTTER POWER” It’s a deep dive into how Flutter can accelerate your app development process and help you reach your milestones quicker.

Finally, testing is comprehensive and intuitive with Flutter. From unit tests that let you test individual functions to integration tests that ensure that every aspect of your app works together just as it should – Flutter has it all covered.

In contrast, Ionic’s use of familiar web technologies can be enticing, particularly to web developers. But in the end, the trade-off might not be worth it. Performance won’t be on par with Flutter, customization will be lacking, and testing may not be as thorough.

When it comes down to it, making the switch to Flutter is all about chasing higher performance, faster development, and more reliable testing. Keep those priorities in mind, and you’ll be set for success in the competitive mobile app development arena.


As we conclude this comprehensive exploration of migrating from Ionic to Flutter, let’s revisit the key points:

  • Performance: Flutter’s use of Dart and its custom rendering engine allows it to deliver superior performance compared to Ionic. This can result in smoother animations, faster load times, and a more responsive user experience.
  • Rapid Product Development: Flutter’s rich set of customizable widgets and hot reload feature can significantly speed up the development process, enabling quick product launches.
  • Comprehensive Testing: Flutter provides a powerful suite of automated testing features covering unit tests, widget tests, and integration tests, ensuring the reliability and quality of your app.
  • Future-Proof: Backed by Google, Flutter is on a rapid growth trajectory, showing strong potential for future mobile app development.

Many factors need to be considered when migrating from Ionic to Flutter, including performance, development speed, testing capabilities, and future readiness. While Ionic’s use of familiar web technologies and its „write once, run anywhere” philosophy may be appealing, it may not offer the same level of performance, customization, and comprehensive testing as Flutter. 

That said, based on our analysis, it’s clear that Flutter offers significant advantages, particularly for complex projects. With its superior performance, rapid product development capabilities, rugged testing features, and promising future, it’s a compelling choice for those looking to stay ahead in the fast-paced world of mobile app development. It’s also important to highlight that while Ionic continues to be a reliable choice, Flutter is a strong contender and worth considering for developers looking to create high-quality cross-platform apps.

Need help?

Let us take the whole app development process off your shoulders

Maksym Kulicki
Maksym KulickiProduct owner, Flutter developer


Get latest insights ideas and inspiration

Need help?

Get latest insights, ideas and inspiration

Take your app development and management further with Codigee


Need help?

Let us take the whole app development process off your shoulders

Let's make something together.

If you have any questions about a new project or other inquiries, feel free to contact us. We will get back to you as soon as possible.

We await your application.

At Codigee, we are looking for technology enthusiasts who like to work in a unique atmosphere and derive pure satisfaction from new challenges. Don't wait and join the ranks of Flutter leaders now!

We are using cookies. Learn more