# Kotlin
URL: https://wwadd.dev/tools/kotlin · Official site: https://kotlinlang.org/
Kind: Typed application programming language · License: Open source · Last verified: 2026-09-30

A language with Java interoperability and coroutine support, used for native Android apps and other application targets. Pair it with Jetpack Compose for Android UI.

Reach for it when:
- Native Android apps
- JVM applications and asynchronous application logic

Worth knowing: Apache-2.0 licensed. Kotlin Multiplatform is a separate architectural choice; using Kotlin in an Android app does not automatically share its UI with iOS.