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Choosing the Right Mobile App Development Technology: Flutter vs. Native

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Oleh Sieroochenko
Choosing the Right Mobile App Development Technology: Flutter vs. Native

Apple's iOS and Google's Android are two popular mobile application platforms that use their native technologies for development. Some notable examples include Swift for iOS with Xcode or Java and Kotlin with Android Studio. However, it is clear that a cross-platform toolkit like Flutter has risen in popularity in recent years, and it provides native output for iOS and Android with a single line of code.

Is it easier to build one app for two mobile platforms than two different applications with separate codebases? We conducted this research to compare criteria such as development cost, efficiency, design, use cases, and more to make your decision-making process more comfortable. By the end of this article, you'll know when to use Flutter or Native technology.

The Battle of Comparisons

What are Native Technologies, and how do they work?

Native application development entails creating an app that is unique to iOS, Android, or Windows, allowing it to fully use mobile features such as the camera, accelerometer, compass, GPS, and other sensors. Native applications are downloaded from app stores such as Google Play for Android and Apple's App Store for iOS. The following are some of the most widely used systems and programming languages:

Swift, Objective-C, and Xcode are all used on iOS.

Android comprises Kotlin, Java, and Android Studio.

 

Use Cases

  • AR/VR apps 
  • Rich-animation apps 
  • Gaming apps 
  • Stand-alone native apps 
  • Apps with complex/advanced UI 
  • GPS-centric apps 
  • Travel-based apps 
  • On-demand apps with heavy computation 
  • AI-triggered apps with massive data volumes 
  • IoT apps that connect to TVs, watches, and wallets

 

What exactly is Flutter?

Flutter is an open-source platform that uses Google's Dart programming language. It's widely referred to as an improved UI toolkit that allows developers to build cross-platform apps from a single codebase. It enables the development of expressive and versatile user interfaces with native performance. A team of Google engineers and the entire flutter community help and contribute to it.

Use Cases

  • MVP mobile apps 
  • Material design apps 
  • Apps that work with OS-level features 
  • Advanced OS plugins with clear logic 
  • Skia rendering engine apps 
  • High-performance apps 
  • Reactivate apps with vast data integration using a lightweight UI with high-level widgets

 

Speed and Cost of Development

Native Technologies

The time it takes to create mobile apps using native technology varies depending on your budget, schedule, and ability to scale. Native technologies can be used to build small-scale and enterprise-level applications that meet iOS and Android users' needs. As a result, either the development team will be large, or two separate iOS and Android teams will be needed.

Since two codes must be written for two different systems with distinct functionalities, this will increase the project's investment budget. To put it another way, native technologies adopt the "write twice, run twice" concept.

Flutter 

Flutter follows the "write once, run anywhere" philosophy, allowing developers to write a single piece of code that can run on two separate platforms. This means that with lower production costs, the time it takes to build would be significantly reduced. Big players like Alibaba, BMW, Watermaniac, and PostMuse, among others, have built their apps on Flutter in as little as five developers.

Not only does it make it easier for developers to write code, but it also makes it easier for novice developers to learn the code. Since the training cost is low, even a new developer can be rapidly trained, removing the need to employ many experienced developers.

 

Code Maintenance

Native Technologies

Since you'll be programming the software for specific devices, maintaining a native application is time-consuming and costly. The explanation is simple: maintaining two codebases takes significant effort, and developers must find bugs and issues with each platform regularly to produce various updates. Besides, maintenance costs rise in lockstep with the number of supported OS devices.

Flutter

Maintaining a Flutter application is simple since there is only one codebase for two applications. The clarity of code makes it easier for developers to spot problems, find external resources, and support third-party libraries. Furthermore, Flutter's stateful Hot Reloading functionality instantly addresses issues.

Compared to other native frameworks, the time it takes to release quality updates and make immediate improvements to the application is shorter. This level of adaptability contributes to the company's overall stability.

 

Native Features and Integration Capacities

Native Technologies

IOS and Android's integration capabilities from their respective frameworks and programming languages differ based on the software design pattern and application performance. To summarize, most native frameworks, including Swift, which are used to develop iOS apps, offer enhanced security and expressive advances in functionality, as well as fast integration options.

Let's take a look at Kotlin and Java for Android. Both frameworks provide seamless integration by simply using their default runtime classes or Intellij environment.

Flutter

Integration of specific features of third-party libraries or plugins is not complex with Flutter, but it may seem advanced to developers unfamiliar with Dart's capabilities. Add-on plugins such as CocoaPods, Android Archive (AAR), and others are required to incorporate targeted features for iOS and Android. On the other hand, the Flutter engine has some limitations in integrating native modules through Xcode in Android Studio.

Its documentation includes step-by-step guidance for overcoming these challenges and successfully integrating it with iOS and Android devices. It may lengthen the time to market, but this is often ignored due to the cost savings resulting from the use of Flutter.

It's also worth noting that Flutter now supports all current iOS versions, including iOS 14, but it has its limitations and the features which change with each new update. The combination of Flutter and iOS 14 has not yet reached its full potential.

 

Application Performance

Native Technologies

Even without external library kits, iOS and Android apps work admirably due to native performance capabilities. Even though "Core Animations" are developed for your app, native apps made with native technologies perform well at 60 and 120 frames per second. The maximum GPU usage native technologies load over RAM ranges from 30 to 45 percent of total GPU performance.

It's also worth noting that native technologies will use up to 118 MiB of computer memory if your software is incredibly resource-intensive. In the long run, unless you select unique external-SDK alternatives to boost performance with low memory usage, it can overload the users' system for the rest of their lives.

Flutter

Flutter does not need a bridge to communicate between native modules since native components are available by default. On a standard computer, the "hello world" app always ran at 60 frames per second, and the time it took to make each frame was less than 16 milliseconds.

There were fewer frames that were dropped. Flutter also uses the Skia graphics library, which allows the UI to be redrawn each time the application view changes. Flutter runs smoothly at 60 frames per second in this manner. At the moment, it can run at 120 frames per second.

 

Application Size

Native Technologies

Consider a simple "hello world" app to get a sense of the bare minimum size that Native technologies provide for iOS and Android platforms. Android apps with Java are 539 KB in size, while those written in Kotlin are no more than 550 KB.

A simple hello world app on iOS can be as small as 1 MB or as large as 3 MB. The maximum size for Android apps is 15 MB, while the full size for iOS apps is 35 MB. The size can be minimized even further by using external or third-party software.

Flutter

An essential "hello world" app built in Flutter was 7.5 MB in size. The Dart Virtual Machine and C/C++ engine affect this app's size. To avoid size problems, Flutter will self-contain all codes and properties. Furthermore, using a unique tag like – split-debug-info reduces the code's size.

 

Decision Making

If you want to do the following, go with native technologies:

  • Build high-performance apps with a solid OS embedded connection between the app and the device.
  • Make full use of the mobile device's hardware resources to access native tools.
  • Create one-of-a-kind MVP applications that cater to a specific market.
  • Work within a development schedule and budget to create advanced native applications.
  • Continually update or modify the application in response to new OS versions and technology stacks.
  • Provide unflinching protection and reliability with basic or complex features.
  • Create applications that work flawlessly and quickly, with a simple user interface to navigate and appeal to a wide range of users.

 

Choose Flutter if you want to:

  • Create a single codebase that includes both front-end and back-end functionality.
  • Establish a deep materialistic and fluid design background.
  • Build native applications that use real-time databases and cutting-edge cloud services.
  • Use reactive widgets and on-demand mobile features to build an MVP.
  • Integrate code magic to enable Continuous Integration to ensure a smooth development process (CI).
  • With cross-platform applications, you can shorten your time to market and reach a broader audience.

 

If you want to stop using native technology, bear the following in mind:

  • Avoid an enormous upfront cost and quickly get the app out into the market.
  • Create applications with a minor or inexperienced development team.
  • Stop an exponential spike in repair and update costs.
  • Provide consumers with a native app with fewer in-app payment options as a workaround.
  • Avoid the growth of global application compatibility and the problems that come with it.

 

Avoid choosing Flutter if you want to:

  • Build native apps with no UI or functional constraints.
  • Emphasize native performance and versatility over novel designs.
  • Create brand or feature-specific applications for a stand-alone company.
  • Use a specified model standard or widely agreed MVP, MVC, and MVVM architectures to build mobile apps.
  • Eliminate the time-consuming error-fixing mechanism with Flutter's several layers of abstraction.
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Oleh Sieroochenko
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