Duolingo for Android was a Java app for its first five years of existence. Two years later, it’s now 100% Kotlin! This migration proved to be a huge win for us in terms of code maintainability and developer happiness. There are already plenty of resources online for learning Kotlin,

This is a community dedicated to the Kotlin programming language.

Useful links:


  • Posts must be relevant to Kotlin
  • No NSFW content
  • No hate speech, bigotry, etc