Kotlin Multiplatform Overview

Kotlin Multiplatform (KMP) enables sharing Kotlin code across different platforms. Kotlin Multiplatform is developed by JetBrains and is officially supported by Google for sharing business logic between Android and iOS. Using KMP to target mobile platforms is stable and production-ready.

Multiplatform Jetpack libraries

Many of our Jetpack libraries have already been migrated to take advantage of KMP. The following Jetpack libraries provide KMP support:

Maven Group ID Latest Update Stable Release Release Candidate Beta Release Alpha Release Documentation
annotation (*) July 16, 2025 1.9.1 - - -
collection March 12, 2025 1.5.0 - - -
datastore May 20, 2025 1.1.7 - - 1.2.0-alpha02 Documentation
lifecycle (*) August 13, 2025 2.9.2 - - 2.10.0-alpha02
paging (*) July 30, 2025 3.3.6 - - 3.4.0-alpha02
room August 13, 2025 2.7.2 2.8.0-rc01 - - Documentation
savedstate August 13, 2025 1.3.1 - - 1.4.0-alpha02
sqlite August 13, 2025 2.5.2 2.6.0-rc01 - - Documentation

Reference documentation

The reference documentation for these libraries (for example, DataStoreFactory) marks the APIs based on their availability for common code, Android, and Native.

You can also filter for declarations by platform at the top of each page. The following table shows the meaning of each marker.

Supported platforms

Jetpack library releases for officially supported platforms, Android and iOS, maintain the same quality and compatibility requirements. However, as we work to expand Jetpack's Kotlin Multiplatform support to other platforms, the tooling and infrastructure support may be a work in progress.

The current level of support for each platform can be summarized in tiers:

Tier 1:

  • Fully tested in CI; including both host-side and on-device tests
  • Source and binary compatibility tracking in accordance with our semantic versioning policies

Tier 2:

  • Partially tested on CI; limited to host-side tests
  • No source or binary compatibility tracking

Tier 3:

  • Untested on CI
  • No source or binary compatibility tracking
Platform Level of support
Android Tier 1
JVM Tier 1
iOS Tier 1
macOS Tier 2
Linux Tier 2
watchOS Tier 3
tvOS Tier 3
Windows Tier 3
JavaScript Tier 3
WASM Tier 3

Tooling support

You can open, edit, and run multiplatform projects in Android Studio. However, some IDE features aren't yet available for these projects.

Create a new KMP module with Android Studio

You can start migrating to KMP by creating a KMP shared module within Android Studio. This module automatically applies all the necessary plugins, including the Android-KMP plugin, to start developing Android and iOS apps.

Kotlin Multiplatform Android Studio Plugin

We recommend installing the Kotlin Multiplatform Android Studio Plugin developed by JetBrains. This plugin offers several features to ease the development experience:

  • New project wizard: Create a new multiplatform project within the IDE.
  • Preflight checks: Preflight checks help you configure your environment.
  • Run configurations: Run, debug, and test applications on both iOS and Android directly from the IDE.
  • Basic Swift support in the IDE: Get basic Swift support in the IDE, including cross-language debugging tools, navigation, and quick documentation.

Additional Resources

For further information about the overall multiplatform ecosystem and more advanced configurations, see the official Kotlin Multiplatform documentation.

Feedback

If you have feedback on these libraries, share it through the issue tracker.