JetBrains Compose Multiplatform

Compose Multiplatform is JetBrains' open source declarative framework for building shared user interfaces across Android, iOS, desktop and web from one Kotlin codebase. It is powered by Kotlin Multiplatform and builds on Jetpack Compose, so Android developers can reuse familiar state management, layout, animation and Material component APIs on other platforms. The vendor lists iOS as stable, Android as supported through Jetpack Compose, desktop as supported on Windows, macOS and Linux, and web as beta. It describes the framework as production ready for mobile and desktop. Teams can adopt it gradually, sharing a single component, a screen or the whole interface, while keeping existing SwiftUI, Android Views or Swing code. Compose Hot Reload previews interface changes on desktop without restarting, and a Kotlin Multiplatform plugin for IntelliJ IDEA and Android Studio provides common previews, cross language navigation, refactoring and debugging across Kotlin and Swift. For AI assistance, the vendor points to code generation powered by Junie, its coding agent. Mobile and cross platform developers who want to share most of their code between platforms are the intended users. The vendor's showcase cites apps that share more than 90 percent of their code, including Fast&Fit and a taxi app, and companies such as Wrike and Physics Wallah. The framework is free and open source, and the page lists no paid plans.