Mobile Apps

Jul 2, 2020

Flutter VS Kotlin: Choose The Right Platform For Cross-Platform App Development

Today, In the world of app development, the cross-platform app development market is experiencing immense growth with every passing year. 

Cross-platform app development allows developers to use one code to develop an app for multiple platforms. Approximately 98 percent of the mobile operating system sector is accounted for by Android and iOS.

Previously, to develop cross-platform apps, developers had relied on React Native. But, as Flutter has matured and Kotlin became popular, businesses are now shifting from React Native to either one among these technologies. In this article, we will speak distinctly about the Flutter VS Kotlin analysis and help you with finding the right alternative for your cross-platform mobile app development.

Cross-Platform App Development

What is Flutter?

Flutter is an open-source platform that had an intent to arrange a marketplace for Google Fuchsia. This SDK helps to develop native, web, and desktop apps using a single code base. Flutter is a framework compatible with iOS, Android, Web, and Desktop. Its library offers one API to define views for multiple platforms at once. 

Google UI system centers around winning innovative and market challenges. Due to which Flutter became an ideal cross-platform mobile app development inside a quick time frame.

Top Features of Flutter

Ease to Use

Flutter is a free and open-source platform that enables documentation, publishing of queries within the open developer discussion board, and then implementation of the code. 

Reload Performance

Scorching reload performance is one of the reasons why Flutter has become popular. This performance makes it easy for everybody to make back-end changes and analyze the front-end distinction. It determines whether the changes are excellent with various components of the appliance or not.

Highly Customizable

Since the platform offers various widgets, Flutter gives developers the space to innovate and offers customized solutions to their customers.

Best for Developing MVPs

Flutter offers the functionality to develop an app for both iOS and Android platforms in minimum time and price. It makes Flutter the best choice for MVP development and creating app prototypes.

Quick Development and Low Cost

Flutter app development is to develop native-like applications for Android and iOS using a single codebase. These help in reducing development time and cost.

What is Kotlin?

Kotlin is a general-purpose, open-source language developed by Jet Brains. It statistically typed as a ‘pragmatic’ platform for Java Virtual Machine. And Android combining object-oriented and functional features.

Kotlin multi platform is an extra feature of Kotlin that can compile to JVM bytecode, JavaScript, or native LLVM code. It can be used for Android, iOS, Web, Desktop, and back-end development in Java framework.

Top Kotlin Features

It is not a Framework

Kotlin is not a framework. Instead, it is an SDK! It means that you don’t necessarily have to shift your complete app to the platform. Alternatively, you will begin working with a single feature and determine if you wish to migrate other parts to the platform or not.

Native UI Experience

Kotlin Multi-platform doesn't demand developers to follow any instructions for UI creation. It enables UI app developers to work on the behavior and performance of the application as they might within the case of the native.

Higher Performance

One of the benefits of considering Kotlin language for cross-platform development is that multiplatform compiles code to the specific same format as the targeted platform. It makes good at performance as its native counterparts.

Quick Learning Curve

Since Kotlin is very similar to Java, Swift, and Scala, it is easy to learn the language and hence design a cross-platform app using Kotlin multiplatform.

Scalability and Flexibility

The developers can scale up the applications without utilizing any virtual machine (VM). It makes it a perfect choice for developing an app where scalability and flexibility are necessary.

Comparison: Flutter VS Kotlin

Both Kotlin and Flutter have great things to provide to mobile app developers. But, a choice must make between the two. Here is the Flutter VS Kotlin comparison, based on some metrics there are in the world of app development.

Flutter VS Kotlin Choose The Right Platform


Flutter delivers excellent hot reloading functionality to its users. High-quality reloading functionality allows for convenience in the process of making alterations at the back-end while simultaneously. And viewing the difference of the modifications in the front-end. In other words, Flutter enables you to decide, on-the-go, whether different elements look perfect.

Kotlin doesn’t disappoint with its performance either. The advantage of the Kotlin language for cross-platform app development is that multi-platform compiles the code in the same format. It allows for better and customized performance. The performance is comparable to Native apps.

Programming Language

Flutter is one of the top cross-platform app development frameworks that use Dart Programming Language, which was introduced by Google. Dart syntax, though rare, is quite easy to understand and learn. Especially for those developers that have already mastered JavaScript.

Kotlin itself is a programming language which is quite similar to Java. As mentioned above, Kotlin was created to interoperate with Java. Hence, just like Flutter, it is easy to comprehend for those who are well-versed on Java.

UI Experience

Flutter app development allows developers to take help from a variety of widgets as provided by the platform. This aids in creating customized and effective mobility solutions.

Kotlin multiplatform, on the opposite, does not require the subsequent of any set-in-stone instructions. Instead, it gives liberty to the UI developer to create an app, without any restrictions. It allows for customized UI experience. In other words, you can create an app that is genuinely unique and aligned with your vision.

Price and Testing Support

Both Flutter and Kotlin are open source and hence free to use. So, there is no better player in these metrics.

But, the testing support, the two provide differ from one another.

While Flutter tends to deliver a wide variety of testing features, including a different widget testing feature, Kotlin focuses on developing back-end development services. It uses Firebase to supply secure back-end options.