Comparing Flutter And Swift For iOS App Development: Which Reigns Supreme In 2023?

Comparing Flutter And Swift For iOS App Development

The Availability of options has made our lives easier, but that is only sometimes true. It also leaves us with the dilemma of choosing the best-suited option to fulfill our needs. Applying a similar philosophy, developers struggle to select the best framework for iOS app development among Ionic, React Native, Flutter, Swift, Adobe PhoneGap, Xamarin, and many more.

The digital market is booming with products and services from two famous companies, Google and Apple. So, how can they remain behind in having a platform of their own for app development? Google makes Flutter, whereas Swift has full support from Apple. So, let’s shortlist the best of these two and take you to a detailed comparison.

What Is Flutter?

Flutter is a framework by Google. This framework for iOS application development aims to produce a type-safe framework that provides high-performance apps and thus can manage a wide range of superior features.

It is a framework for building beautiful, responsive user interfaces that can run on multiple platforms with a single code base. Flutter is best for high-performance and an all-round programming platform for building iOS, Android, and Windows apps.

Flutter for iOS app development has a lot of advantages over other native development. As for native development, you need different languages for each sort of development, which is quite messy. But in the case of Flutter, it needs one programming language. Flutter code is based on the Dart programming language.

Pros Of Using Flutter

  • Excellent user interface structure to build customized iOS mobile apps
  • Gives out quick compilation and maximum output for the project
  • Best for startups, a less expensive one for iOS and Android
  • Benefits of Flutter widgets to personalize and build a valuable UI for your consumers
  • Excellent and easy-to-understand documentation
  • Easy to connect the Flutter app to Firebase for cloud functions and cloud messaging
  • With Flutter, you can enhance faster time to market
  • Has a single code base

What Is Swift?

Swift is a multi-paradigm compiled language famous for building apps that grow inside Apple’s walled garden. Swift for iOS app development is used to build mobile apps on iOS, desktop apps on Mac OS, and wearable apps for watch OS. This language is safe, fast, and expressive.

Their main aim is to gain more attention from developers for iOS development services. Swift is intended to replace Objective-C language, Apple’s priority language. Swift is 2.6 times faster than Objective-C. The Swift language has constantly evolved.

During the runtime, it has the best native error-handling functions. It provides support for throwing, catching, propagating, and manipulating errors. Coding is faster in Swift, as it uses simple syntax. Therefore, the demand for Swift developers is increasing.

Pros Of Using Swift

  • Easy-to-learn and easy to use
  • Simple and very intuitive
  • Uses LLVM compiler technology, which makes Swift more powerful
  • Supports all Apple’s platforms, Linux, Windows, and Ubuntu
  • The most desirable language to choose because of its safer, interactive interface.
  • Provides various safety features such as variable initialization, value types, etc.
  • Swift has one of the most active and large open-source communities.
  • Guarantees high performance in the app development process.

Comparing Flutter And Swift For iOS App Development

In the market, both Flutter and Swift have kept their pace and are evolving around user requirements. Here, you can find the Flutter and Swift comparison in all aspects you need to know.

Integration And Development

Swift and Flutter are excellent app development choices. Flutter includes a wide range of plugins as add-ons. It also integrates with ease to services like Google Maps.

On the other hand, Swift provides tools that do the job well enough, along with APIs for iOS apps, mainly if used with Xcode. Both tend to make app development efficient with the features they bring into play.

Application Size

Flutter creates small mobile apps quickly at a meager cost. It includes features for reducing app size, like tree sharing and code splitting. Swift, an iOS app development tool, also does something similar.

Its compiler speeds up as the app size reduces. Swift also provides optimizations like the whole module and link-time options, which help further minimize program size.

Development Time

Swift stands up to its name as quick and easy to use, easing the app development process. It provides simple tools and features in Xcode that show development time after compiling. However, Flutter app development is suitable for cross-platform apps as it saves time and money.

Its hot reload feature indicates real-time code changes, further simplifying the process. Although Flutter is slower than Swift in clean builds, it quickly catches pace after the first build.

Performance And Efficiency

Swift gives you distinct apps for each platform. It doesn’t have boundaries for any budget issues. Moreover, it creates quick, reliable apps with optimized code and memory management, making them ideal for heavy workloads.

Flutter is perfect for iOS app development if you seek cost-effectiveness and a cross-platform solution. It has smooth animations, quick startup speeds, and UI effects that you can easily customize.


It matters in app development to consider people with difficulties. Swift supports accessibility features by default, but developers must provide data for each element.

Flutter lacks built-in accessibility and depends on tools such as Xcode’s Accessibility Inspector. Since 2018, efforts have been in the right direction to improve this. As a result, Swift is now more user-friendly for developers, so the programs are accessible to anyone. While the two approaches are vital, Swift has a benefit regarding accessibility that promotes equality in app development.


Despite being new, Flutter and Swift are both stable and safe. Flutter, on one side, has support of a dedicated team by Google, which provides outstanding stability and reliability. It comes with tools for identifying and fixing errors before users see them.

Apple’s Swift iOS app development extensively focuses on security and stability. Developers concentrate on reducing bugs and crashes while providing users with a great experience.

Code Reusability

Flutter gives developers access to a vast set of reusable widgets, which speeds up app creation and simplifies maintenance.

Swift does well in macOS and watchOS programs, allowing code reuse across Apple platforms. It offers access to many system APIs to build iOS components effectively. Flutter’s cross-platform aspects offer a clear reusability advantage, although Swift remains essential for iOS developers building highly reusable components.

User Interfaces

Flutter’s widgets and customization features make creating appealing and responsive user interfaces simple and provide pre-built components. Those components are easy to customize to meet any design or uniqueness.

Its flexible layout framework allows complex UIs to be simple to create with ease. On the other hand, Swift is native to iOS, giving smooth interaction in the iOS application development process. It delivers an actual iOS experience. Its reliable APIs enable highly customized UI components like buttons and labels, fulfilling user app design requirements.

Community Support

Flutter provides many resources like tutorials and forums, contributing to quicker development. Its community is rapidly growing due to everyday package additions. Swift has an engaged community that offers various tools, tutorials, and external packages.

Swift Package Manager makes dependency management more accessible, resulting in faster app creation and maintenance. Both communities offer lots of support, making them equally important tools for creators in iOS app development.


Flutter provides documentation that is easy to understand using clear explanations along with examples, making learning simple and enjoyable. Developers can try out new widgets in real time.

Swift also has comprehensive documentation that includes syntax and functions. Swift Playground, an interactive application, allows users to develop and test code in real-time. These tools improve the learning experience by giving developers the support they require for building successful apps.

Learning Curve

Flutter app development has a simple learning curve, particularly if you’re familiar with languages such as Kotlin or Java. Similarly, Swift is also easy to learn. However, Flutter’s popularity helps it be the best in terms of a learning curve.

Development Cost

As both Flutter & Swift are open-source, users save money. Hiring skilled coders is simple here. Swift iOS application development is not costly at all. However, Flutter allows you to reach more clients for the same budget. You can develop iOS and Android apps using the same code. So, if money is an issue, Flutter is a low-cost solution to reach a larger audience.

API Level

From its platform channels, Flutter may access native APIs. It implies that the same native APIs could be readily available in Flutter app development as in native apps. This makes it possible to access all native functions while providing a consistent user experience.

Availability Of Tools

Flutter has its set of tools that help out with the app development process, like –

  • DartPad
  • VS Code
  • Flutter SDK

Swift also comes with several tools, just like Flutter. They are –

  • Swift Playgrounds
  • Xcode
  • Swift Package Manager

Besides these, they have many plugins for both of them that support iOS app development. However, Flutter takes the lead in this scenario.

What To Use Where? Flutter Vs Swift

Swift and Flutter are the most suitable options for iOS app development. The complexity of choosing one between Flutter and Swift is increasing daily. Though both frameworks are equally efficient and matter to most business owners’ requirements, specific measures make them different from each other.

Use Case Of Flutter

Flutter is the perfect open-source platform for modern companies and concepts that must win over investors. Developers can view changes instantly because of the Hot Reloading ability. It’s also helpful in exploring different apps compared to being with just one native app.

Use Case Of Swift

Swift suits complex iOS apps because it provides high speed and scalability. This free and open-source language is perfect for projects with complicated needs as it assures solid functionality and high standards.

Its adaptability makes it an excellent choice for developers looking to create solid and advanced iOS mobile apps for iOS platforms.

Final Verdict- Which Is Best?

Choosing between Flutter and Swift for app development can vary depending on the factors of developers and the app that requires development. If there is a priority on functionalities, get along with Swift. However, Flutter will simplify things if the focus is having a single codebase.

Moreover, the developers should choose whatever they are familiar with and comfortable with. Any misconception in the development process can lead to unnecessary bugs and other issues that may need further fixing later. Hybrid App Builder has provided a detailed overview of Flutter and Swift for iOS app development, allowing you to justify better the framework required for a particular project.

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Co-Founder & Director, Business Management
HybridAppBuilders help you find the best app developer for your needs. We believe in sharing knowledge and increasing awareness, and to contribute to this cause, we try to include all the latest changes, news, and fresh content from the mobile app development world in our blogs.