What's New in Compose Multiplatform (KotlinConf 2026)

Compose Multiplatform lets you build beautiful UI with idiomatic Kotlin for Android, iOS, Desktop, and Web apps! It’s stable, production-ready, constantly evolving, and it already powers the experiences of millions of users every day. Its declarative nature also makes it a perfect fit for building cross-platform apps in the age of agentic development.

As a framework that can be adopted incrementally rather than requiring a full rewrite, you can start using it risk-free even in existing apps. Your Android skills seamlessly transfer to other platforms, with tools like Navigation 3 already available for Compose Multiplatform.

In this talk, we’ll take a hands-on look at everything that’s new and exciting. iOS improvements like faster rendering, enhanced input handling, and better interop that enables the use of Liquid Glass elements. Web features including accessibility, interop, and other improvements.

And of course, we’ll discuss the developer experience: with a unified @Preview system, a mature Hot Reload solution, and a thriving ecosystem that covers all important areas of modern app development.

https://zsmb.co/talks/whats-new-in-cmp-2026/

Transcript

1. Modernizing Preparing for Multiplatform Going Multiplatform 1 What’s New in Compose Multiplatform Building Shared UI for iOS and Beyond Márton Braun Sebastian Aigner
2. Agenda 2 • Where Compose Multiplatform is today • Onboarding and tooling • General improvements • Platform-specific updates
3. 3 Compose Multiplatform
4. 4 Stable Stable Stable Beta Compose Multiplatform
5. 5 UI UI Shared Logic Shared Logic Shared Logic Logic Shared UI
6. 6 UI UI Shared Logic Shared Logic Shared Logic Logic Shared UI UI
7. 7 Perk
9. Sony 9 SPOILER ALERT
10. 250M DAU 340M MAU 10
11. 250M DAU 11 340M MAU
12. 12 with Compose Multipla0orm!
13. Demo
14. 14 Features for all platforms
15. 15 Jetpack Compose
16. 16 Jetpack Compose
17. 17 BETA Mar 11 ALPHA Dec 03 STABLE Apr 22 1.11 ALPHA Aug 13 BETA Oct 22 STABLE Dec 03 1.10 ALPHA Apr 23 BETA Jun 18 STABLE Aug 13 1.9 BETA Mar 26 STABLE May 13 ALPHA Dec 15 1.11 STABLE Jan 13 BETA Nov 03 ALPHA Sep 03 1.10 STABLE Sep 16 BETA Jul 22 Alpha Jun 5 1.9 Jetpack Compose Visibility change modifier 2D scroll APIs Material 3 Expressive Window inset rulers Shadow modifiers keepScreenOn modifier Improved shared element transitions Retain API Veiled transitions Unified @Preview annotation Navigation 3 Flexbox layout Grid layout Style API mediaQuery API v2 testing APIs New SlotTable implementation
18. New features in the last year 18 BETA Mar 26 STABLE May 13 ALPHA Dec 15 STABLE Sep 16 BETA Jul 22 Alpha Jun 5 1.11 STABLE Jan 13 BETA Nov 03 ALPHA Sep 03 1.10 1.9 Flexbox layout Grid layout Style API mediaQuery API v2 testing APIs New SlotTable implementation Improved shared element transitions Retain API Veiled transitions Unified @Preview annotation Navigation 3 Visibility change modifier 2D scroll APIs Material 3 Expressive Window inset rulers Shadow modifiers keepScreenOn modifier
19. New features in the last year 19 BETA Mar 26 STABLE May 13 ALPHA Dec 15 STABLE Sep 16 BETA Jul 22 Alpha Jun 5 1.11 STABLE Jan 13 BETA Nov 03 ALPHA Sep 03 1.10 1.9 Flexbox layout Grid layout Style API mediaQuery API v2 testing APIs New SlotTable implementation Improved shared element transitions Retain API Veiled transitions Unified @Preview annotation Navigation 3 Material 3 Expressive Window inset rulers Visibility change modifier 2D scroll APIs Shadow modifiers keepScreenOn modifier
20. New features in the last year 20 BETA Mar 26 STABLE May 13 ALPHA Dec 15 STABLE Sep 16 BETA Jul 22 Alpha Jun 5 1.11 STABLE Jan 13 BETA Nov 03 ALPHA Sep 03 1.10 1.9 Flexbox layout Grid layout Style API mediaQuery API v2 testing APIs New SlotTable implementation Retain API Unified @Preview annotation Navigation 3 Visibility change modifier 2D scroll APIs Material 3 Expressive Window inset rulers Shadow modifiers keepScreenOn modifier Improved shared element transitions Veiled transitions
21. New features in the last year 21 BETA Mar 26 STABLE May 13 ALPHA Dec 15 STABLE Sep 16 BETA Jul 22 Alpha Jun 5 1.11 STABLE Jan 13 BETA Nov 03 ALPHA Sep 03 1.10 1.9 v2 testing APIs New SlotTable implementation Improved shared element transitions Retain API Veiled transitions Unified @Preview annotation Navigation 3 Visibility change modifier 2D scroll APIs Material 3 Expressive Window inset rulers Shadow modifiers keepScreenOn modifier Flexbox layout Grid layout Style API mediaQuery API
22. New features in the last year 22 BETA Mar 26 STABLE May 13 ALPHA Dec 15 STABLE Sep 16 BETA Jul 22 Alpha Jun 5 1.11 STABLE Jan 13 BETA Nov 03 ALPHA Sep 03 1.10 1.9 Flexbox layout Grid layout Style API mediaQuery API v2 testing APIs New SlotTable implementation Improved shared element transitions Retain API Veiled transitions Unified @Preview annotation Navigation 3 Visibility change modifier 2D scroll APIs Material 3 Expressive Window inset rulers Shadow modifiers keepScreenOn modifier
23. New features in the last year 23 BETA Mar 26 STABLE May 13 ALPHA Dec 15 STABLE Sep 16 BETA Jul 22 Alpha Jun 5 1.11 STABLE Jan 13 BETA Nov 03 ALPHA Sep 03 1.10 1.9 Flexbox layout Grid layout Style API mediaQuery API v2 testing APIs New SlotTable implementation Improved shared element transitions Retain API Veiled transitions Unified @Preview annotation Visibility change modifier 2D scroll APIs Material 3 Expressive Window inset rulers Shadow modifiers keepScreenOn modifier Navigation 3 Navigation 3
24. 24 Navigation 3
25. Navigation 3 Modernizing Preparing for Multiplatform Going Multiplatform 25 • Compose-first
26. Navigation 3 Modernizing Preparing for Multiplatform Going Multiplatform 26 • Compose-first • Flexible List<T> UI
27. Navigation 3 Modernizing Preparing for Multiplatform Going Multiplatform 27 • Compose-first • Flexible • Adaptive
28. Navigation 3 Modernizing Preparing for Multiplatform Going Multiplatform 28 • Compose-first • Flexible • Adaptive
29. Navigation 3 Modernizing Preparing for Multiplatform Going Multiplatform 29 • Compose-first • Flexible • Adaptive • Multiplatform Stable
30. Demo
31. Navigation 3 31 jb.gg/nav3-browser
32. Navigation 3 resources 32 jb.gg/compose-navigation jb.gg/nav3-recipes
33. More about Navigation 3 33
34. 34 @Preview
35. @Preview 35 android common jvm org.jetbrains.compose.ui.tooling.preview.Preview androidx.compose.desktop.ui.tooling.preview.Preview androidx.compose.ui.tooling.preview.Preview
36. @Preview 36 org.jetbrains.compose.ui.tooling.preview.Preview androidx.compose.desktop.ui.tooling.preview.Preview androidx.compose.ui.tooling.preview.Preview common common jvm
38. @Preview 38 jb.gg/compose-previews
39. 39 Compose Multiplatform for iOS is now Stable
40. 40 Compose Multiplatform for iOS is now faster glassier textinputier er er er
41. 41 A { new | improved | parallel } rendering pipeline for iOS Default in 1.11
42. 42 Previously… GPU main Snapshot / Layout Picture Submit commands Draw / Shaders Wait for Drawable ! screen
43. 43 Parallel rendering render main GPU screen Snapshot / Layout Picture Submit commands Draw / Shaders Wait for Drawable !
44. 44 Parallel rendering + our own surface render main GPU screen Snapshot / Layout Picture Submit commands Draw / Shaders ! Wait for Drawable
45. Parallel rendering 45 faster in complex layouts faster in complex Canvas drawing 20% 11%
46. New iOS APIs 46 Overlaid interop views Truly-native text fields
47. 47 Liquid Glass
50. 50 Liquid Glass in Compose Multiplatform
51. Demo
52. Overlay interop views 52 Experimental in 1.10 @OptIn(ExperimentalComposeUiApi!"class) @Composable actual fun PlatformActionButton( onClick: () # Unit, modifier: Modifier, ) { UIKitView( factory = { !" !!# !$ }, modifier = modifier, properties = UIKitInteropProperties( placedAsOverlay = true, ), ) }
53. 53 Avoid overusing Liquid Glass effects. If you apply Liquid Glass effects to a custom control, do so sparingly. Liquid Glass seeks to bring attention to the underlying content, and overusing this material in multiple custom controls can provide a subpar user experience by distracting from that content. Limit these effects to the most important functional elements in your app.
54. 54 Avoid overusing Liquid Glass effects. If you apply Liquid Glass effects to a custom control, do so sparingly. Liquid Glass seeks to bring attention to the underlying content, and overusing this material in multiple custom controls can provide a subpar user experience by distracting from that content. Limit these effects to the most important functional elements in your app.
55. 55 jb.gg/compose-liquid-glass
56. 56 iOS text input
57. 57 Native iOS text input Experimental in 1.11
58. 58 Native iOS text input Experimental in 1.11
59. Demo
60. Summarizing iOS 60 Perf Interop Overlays Autosizi ng Native input methods
61. Summarizing iOS 61 Perf Interop Overlays Autosizi ng Native input methods
62. Summarizing iOS 62 Perf Interop Overlays Autosizing Native input methods
63. Beta 63 Compose Multiplatform for Web
64. Demo
65. Performance improvements 65
66. Summary 66 Hundreds of millions of active users. Faster and faster release cycles. Constant improvements for all platforms.
67. 67 jb.gg/compose Build your next app with shared UI with
68. … and don’t forget to vote! zsmb.co/talks Márton Braun @zsmb.co sebi.io Sebastian Aigner @sebi.io What’s New in Compose Multiplatform Better Shared UI for iOS and Beyond