How to Learn Kotlin for Free A Comprehensive Guide


Kotlin is a versatile and modern programming language that has gained immense popularity in recent years. Learn Kotlin for Free, Developed by JetBrains, it is officially supported for Android app development, making it a valuable skill for anyone interested in mobile app development. Additionally, Kotlin is widely used in web development, server-side applications, and more. Learning Kotlin can open up numerous opportunities for programmers, and the good news is that you don’t need to break the bank to do so. In this guide, we will explore how to learn Kotlin for free.

Why Learn Kotlin?

Before delving into the resources and methods for learning Kotlin for free, let’s understand why learning this language is a worthwhile pursuit.

  1. Android App Development: Kotlin is the preferred language for Android app development. Google officially endorsed Kotlin as the first-class language for Android, which means it offers better tooling and integration with the Android ecosystem.
  2. Versatility: Kotlin is not limited to Android development. It can be used for a wide range of applications, including web development, server-side development, and desktop applications. This versatility makes it a valuable addition to any developer’s skill set.
  3. Modern and Concise: Kotlin is designed to be more concise and readable compared to Java, which was the traditional language for Android development. Its modern features, such as extension functions and smart casts, simplify code and increase productivity.
  4. Strong Community: Kotlin has a rapidly growing community of developers who actively contribute to its ecosystem. This means there are plenty of resources, libraries, and support available for learners.
  5. Career Opportunities: Learn Kotlin for Free can open up job opportunities in various domains, especially in the mobile app development industry. As the demand for Kotlin developers continues to rise, so do the prospects for career growth.

Now that we understand the advantages of learning Kotlin, let’s explore how you can do so for free.

Learning Kotlin for Free: Methods and Resources

1. Official Kotlin Documentation

The official Kotlin documentation is one of the best places to start. It’s comprehensive and regularly updated. The documentation covers everything from basic syntax to advanced features. You can find it at It’s a valuable resource for reference and learning.

2. Kotlin Playground

The Kotlin Playground is an interactive web-based tool that allows you to write and run Kotlin code in your browser. It’s a fantastic resource for hands-on learning and experimentation.

3. YouTube Tutorials

YouTube is a treasure trove of free educational content, and Kotlin tutorials are no exception. Many experienced developers and educators create video tutorials that cover various aspects of Kotlin programming. Some popular channels to explore include “Kotlin Programming,” “KotlinConf,” and “CodeWithChris.”

4. Kotlin Koans

Kotlin Koans is an interactive, hands-on way to learn Kotlin. It’s a set of exercises that guide you through the language’s features step by step. You can access it at

5. GitHub Repositories

GitHub hosts numerous open-source Kotlin projects. You can explore the source code, learn from real-world examples, and even contribute to these projects. GitHub’s search feature allows you to find Kotlin repositories in various domains, from Android apps to web applications.

6. Codecademy

Codecademy offers a Kotlin course as part of its free and paid offerings. While some parts of Codecademy’s platform require a subscription, there are often free trials and promotions that provide access to the course for free.

7. edX

edX, a platform for online education, offers a free Kotlin for Android App Development course in collaboration with JetBrains. This course is a great way to learn Kotlin specifically for Android development. While a certificate of completion may require payment, you can audit the course for free.

8. Coursera

Coursera provides access to Kotlin-related courses from universities and institutions worldwide. While some courses are paid, you can often audit the course material for free. The “Kotlin for Java Developers” course is a notable option.

9. Blogs and Articles

Many developers and tech enthusiasts regularly share their insights and experiences with Kotlin through blogs and articles. Websites like Medium,, and Kotlin’s official blog offer a plethora of free articles covering Kotlin-related topics.

10. Online Forums and Communities

Online forums and communities like Stack Overflow, Reddit’s r/Kotlin, and the Kotlinlang Slack channel provide a platform for asking questions, discussing best practices, and learning from experienced developers. These resources are invaluable for getting answers to specific questions and learning from real-world scenarios.

11. Books

While many programming books are not available for free, there are some classic Kotlin books that are free to access online. “Kotlin for Android Developers” by Antonio Leiva is available for free on his website, and “Kotlin for Android App Development” by Peter Sommerhoff can be read for free on GitHub.

12. Hackathons and Coding Challenges

Participating in hackathons and coding challenges is an excellent way to apply your Kotlin skills in real-world scenarios. Websites like LeetCode, CodeSignal, and HackerRank offer coding challenges that allow you to practice Kotlin and compete with other developers.

13. Kotlin User Groups and Meetups

Check if there are Kotlin user groups or meetups in your area or online. These groups often host free events, workshops, and presentations on Kotlin-related topics. It’s a great way to connect with other learners and experienced Kotlin developers.

14. Social Media and Podcasts

Follow Kotlin-related accounts on platforms like Twitter, LinkedIn, and listen to podcasts that discuss Kotlin programming. These platforms are great for staying updated with the latest trends, news, and tips in the Kotlin community.

15. Online Courses and MOOCs

Massive Open Online Courses (MOOCs) like Udacity, Coursera, and edX offer free and paid Kotlin courses. While some courses may require payment for certification, you can access the course materials for free.

16. Kotlin Conferences and Webinars

Kotlin conferences, such as KotlinConf, often provide free access to conference talks and presentations. Keep an eye on announcements for upcoming conferences and webinars related to Kotlin.

17. GitHub Gists

GitHub Gists are like mini-blog posts where developers share code snippets, tutorials, and tips. You can find numerous Kotlin-related Gists that cover various aspects of the language and its applications.

18. Code Review Platforms

Websites like CodeReview.StackExchange and Reddit’s r/codereview allow you to post your Kotlin code for review by experienced developers. Getting feedback on your code is a valuable part of the learning process.

19. LinkedIn Learning (

LinkedIn Learning offers a free trial period during which you can access their extensive library of courses, including Kotlin programming courses. This can be a great opportunity to learn Kotlin for free.

Tips for Effective Learning

Learning a programming language can be a challenging but rewarding journey. Here are some tips to make your Kotlin learning experience more effective:

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