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Which is better for Android development: Kotlin or Java


The choice between Kotlin and Java has long been a topic of debate among Android developers. While both languages have their own unique features, some believe that one language is better suited for Android development than the other. In this article, we will explore the pros and cons of each language and determine which one is better for Android development based on real-world usage and expert opinions.



Java is the most widely used programming language for Android development. It is an object-oriented language that was designed specifically for mobile application development. Java is known for its simplicity, portability, and scalability. However, it can be prone to memory leaks and is not as performant as Kotlin. Java also requires more lines of code than Kotlin, which can make it harder to write efficient code.


Kotlin is a statically typed programming language that was developed by JetBrains. It is designed to be interoperable with Java, meaning that Java and Kotlin code can run together seamlessly. Kotlin is known for its concise syntax and improved performance compared to Java. It also has built-in support for modern Java features such as lambda expressions, functional programming, and type safety. Additionally, Kotlin is a more modern language that is better suited for modern development practices.

Case Studies:

Many popular Android applications are developed using Kotlin, including Trello, GitHub, and Pinterest. These applications have reported improved performance and faster development times compared to Java. Additionally, Kotlin has become the default language for Android development in recent years, indicating that many developers prefer it over Java.

Expert Opinions:

Many experts in the field of Android development prefer Kotlin over Java due to its concise syntax, improved performance, and modern features. However, some developers still prefer Java due to its widespread usage and compatibility with existing codebases.

Real-life Examples:
Here are a few real-life examples of how Kotlin has improved the performance and development time of Android applications:

  • The popular note-taking app Evernote reported a 30% improvement in app launch times when they switched from Java to Kotlin.
  • The popular game Clash Royale also reported faster development times and improved performance when they switched from Java to Kotlin.


In conclusion, the choice between Kotlin and Java for Android development ultimately depends on personal preference and the specific requirements of your project. While Java is still widely used and has its own unique features, Kotlin has become increasingly popular due to its modern syntax, improved performance, and support for modern development practices. Whether you choose Kotlin or Java, it is important to consider the specific needs of your project and choose the language that will best meet those needs.