What can Kotlin be used for?

Kotlin/JS frameworks You can use both reactive and imperative programming models to build your frontend , use connectors for Ktor, Spring Boot, and other frameworks to integrate it with your server-side applications, and share code using Kotlin Multiplatform.

Kotlin can be used for any kind of development, be it server-side, client-side web and Android . With Kotlin/Native currently in the works, support for other platforms such as embedded systems, macOS and iOS is coming.

However, as was made clear at the Google I/O session on Kotlin, Kotlin can be interpret down to JavaScript and Objective-C as well. This means, you can have an API, web-app, Android app, iOS app and use nothing but Kotlin to get there .

In fact, we can say that Kotlin is much better than Java code in terms of security, compatibility, type inference, syntax, data classes, boilerplate code, and functional programming . At the same time, there are features similar on both Java and Kotlin, like lambda expressions, type system, and annotation processing.