When Kotlin burst onto the scene as an official language for Android in 2017, I didn't rush to learn it. Java felt familiar, and I didn't see the point in switching. Then one weekend, I tried rewriting a small project in Kotlin. Suddenly, everything was cleaner. No more endless boilerplate. Null safety built right in. Functional features that just worked. I didn't just like Kotlin—I wanted to use it everywhere.
As you begin your journey in Swift app development, learning Kotlin can be an exciting and valuable skillset to acquire. With its growing popularity in full-stack apps, Spring projects, and even multi-platform codebases, the time is right to get fluent.
Fast forward to 2026: figuring out where to start can be overwhelming. That's why I've curated this list of the best Kotlin courses for developers looking to master the language.
Top-Rated Kotlin Courses for Swift App Development
The Ultimate Guide to Kotlin Programming – Educative.io (Top Pick)
Educative.io's Kotlin Guide is an interactive and setup-free way to learn Kotlin, making it perfect for beginners or those looking for a smooth transition from Java. With inline exercises and a focus on language fundamentals, this course is designed to help you build a strong foundation in Kotlin.
Kotlin for Android Developers – Kodeco (formerly Ray Wenderlich)
Kodeco's tutorials have gained a cult following among mobile devs, and their Kotlin for Android Developers track is no exception. With polished, detailed lessons and a focus on practical Android development, this course is ideal for those looking to build real-world apps.
Developing Android Apps with Kotlin – Udacity (Google)
This official Google-backed course takes you through building Android apps step by step, using Kotlin along the way. You'll work inside Android Studio, design UIs, and ship working apps while learning Kotlin fundamentals.
Why Choose Kotlin for Swift App Development?
Kotlin's growing popularity in full-stack apps, Spring projects, and even multi-platform codebases makes it an exciting skillset to acquire. With its clean syntax, null safety, and functional features, Kotlin is the perfect language for developers looking to streamline their workflow.
Conclusion
Mastering Kotlin can be a game-changer for Swift app development. Whether you're an absolute beginner or looking to level up your skills, these top-rated courses will guide you on your journey. So, what are you waiting for? Dive into the world of Kotlin and unlock new possibilities in Swift app development!