Flutter App Development – Pros and Cons

You have probably used Flutter apps without even noticing. If you have ever used a digital coupon, paid with Google Pay, or run a campaign on Google Ads, you have experienced Flutter at work.   

Google first launched its alpha toolkit in May 2017 and released its stable version at the end of 2018. From there onwards, Flutter’s popularity has dramatically increased. In 2020, the third generation of Flutter was released – it offered upgrades to improve the user experience for both end users and developers.   

This article explains what Flutter is and highlights its advantages and drawbacks.  

What is Flutter?  

Flutter is Google’s open-source SDK (software development kit) for building mobile, desktop, and web applications for Android, iOS, and Windows using a single codebase. It enables developers to create great cross-platform mobile application development, thus saving time and effort as they don’t have to code separately for the apps. You just need a single codebase for the various platforms.  

It is also very important to note that Flutter is not a library or a framework, unlike other popular app development solutions. Instead, it is an SDK – a comprehensive set of tools needed for application development, including documentation, libraries, frameworks, APIs, etc.   

What Does Flutter Offer?  

Flutter offers all the tools you require for building exceptional, high-performance cross-platform applications. Let’s explore Flutter’s architecture.  

Flutter has the following major architectural layers:  

  1. It has an embedder that employs a platform-specific and enables an application to run on any operating system.  
  2. It has an engine written in C/C+ that enables low-level implementation of Flutter’s fundamental APIs. This includes text layout, graphics (Skia), accessibility support, file and network I/O, a Dart runtime and compile toolchain, and plugin architecture.  
  3. It has a framework based on Dart, a client programming and object-oriented language developed by Google. Although it offers an amazing set of libraries that you can divide into layers (rendering layer, widget layer, etc.), its implementation is optional and not compulsory.  

Widgets are another critical Flutter component. They function as the building blocks that encompass all the development framework aspects in the Flutter SDK. Flutter gives you access to many ready-made widgets in addition to letting you customize them or create your own widgets. Widgets make Flutter an object-oriented programming language, and all the objects in Flutter are widgets, be they fonts or buttons. They are organized as trees in the SDK.  

Moreover, Flutter gives you access to an automated testing toolset that you can use to run three tests: unit, widget, and integration. You can learn more about these tests here.   

It also supports the continuous delivery development and release model through Fastlane (an open-source automation platform) to connect Flutter with famous continuous integration tools like Jenkins, Travis, etc.  

You can use Dart DevTools, also called Flutter DevTools, for debugging. They can be used to analyze performance, inspect the layout, debug apps, etc. You can learn more about Flutter’s architecture by clicking here.  

A Word on Flutter 2 & Flutter 3  

Google originally developed Flutter as a mobile-centric SDK to help developers build native iOS and Android apps using a single codebase. However, Google released Flutter 2 in 2021 to enable developers to build web and Windows apps.  

In 2022, Google launched Flutter 3, offering support for macOS and Linux that runs on Apple and Intel processors. It also supports Material Design 3 (a set of tools used to build beautiful UIs) and foldable phones. Thus, Flutter technology supports application development across six platforms.   

Let’s discuss the pros and cons of Flutter app development now.  

Pros and Cons of Flutter App Development  

Every programming language has its own benefits and drawbacks. However, one can say that Flutter is unique in that its advantages outweigh its disadvantages when compared to other similar technologies.   

Let’s look at some of the leading benefits of Flutter, which differentiate it from other competing languages.  


  • Single Codebase – Flutter offers you a reusable codebase, thus eliminating the need for developers to write different codes for iOS and Android app development. Not only can you use the same codebase for iOS and Android apps but also for desktop and web apps. This lowers your development costs and shortens the development time significantly. It also increases the time to market speed.  
  • Widgets – Flutter widgets, a critical component of the Flutter SDK, are an excellent way to create engaging and delightful user interfaces. And the best part about Flutter’s customizable widgets is that you don’t need to worry about your application UI on various devices, not to mention the limitless customization options!  
  • Great Libraries – As mentioned earlier, Flutter employs the Skia Graphics Library. This open-source, fast, and mature graphics library redraws a user interface (UI) each time a different view is presented. It enables quick application loading and a seamless app experience.  
  • Hot Reload – You don’t need to reload your Flutter app every time you make a change in its code. Instead, you can use its hot reload feature to execute changes in your app in real-time, thus enabling you to experiment with the code and address bugs simultaneously.  


  • Large File Size – Flutter apps are often large due to widgets. This causes them to take up more space on your device. It also means that Flutter apps take more time to download and update.  
  • Absence of Third-Party Libraries – Third-party libraries and packages are vital in software development automation. Although Flutter widgets largely remove the need to depend on third-party libraries, the packages (over 25,000) offered by Flutter are less than React Native’s, its main competitor. The reason is that Flutter is a relatively new SDK. However, the number of these libraries and packages is increasing with time.  
  • Complex Updates – You have to update Flutter modules in order to update an operating system’s programming requirements. This means you have to recompile and reinstall Flutter modules on the devices since the modules are integrated as fixed components in the program. 

Wrap Up  

Despite having a few shortcomings, Flutter is increasingly becoming the go-to SDK for developers looking to build incredible cross-platform mobile applications. It is backed by Google and boasts a rapidly growing community of developers.  

Many leading companies use Flutter for web, desktop, and cross-platform mobile application development trends, including Airbnb, Alibaba, and eBay, among others.   

Xavor has an expert team of Flutter developers that comprehends your business needs and delivers a top-notch application to help you accelerate your business growth.  

Are you interested in building a flutter app development? Contact us at [email protected] for a free 15-minute consultation session.  

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