What's New in Compose Multiplatform (next app dev con Berlin 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. What’s New in Compose Multiplatform Building Shared UI for iOS and Beyond Márton Braun Sebastian Aigner
2. Agenda • Where Compose Multiplatform is today • Onboarding and tooling • General improvements • Platform-specific updates 5
3. Compose Multiplatform 6
4. Compose Multiplatform Stable Stable Stable Beta 7
5. UI UI Shared UI Logic Shared Logic Shared Logic Shared Logic 8
6. UI UI Shared UI UI Logic Shared Logic Shared Logic Shared Logic 11
7. Perk 13
9. Sony 15
10. Sony 16
12. 250M DAU 340M MAU 18
13. with Compose Multiplatform! 19
14. Demo
15. Features for all platforms 21
16. Jetpack Compose 22
17. Jetpack Compose 23
18. 1.9 ALPHA BETA STABLE Apr 23 Jun 18 Aug 13 1.10 ALPHA BETA STABLE Aug 13 Oct 22 Dec 03 ALPHA 1.11 Dec 03 Jetpack Compose 1.9 Alpha BETA STABLE Jun 5 Jul 22 Sep 16 ALPHA 1.10 Sep 03 BETA STABLE Nov 03 Jan 13 1.11 BETA STABLE Mar 11 Apr 22 ALPHA BETA STABLE Dec 15 Mar 26 May 13 24
19. New features in the last year 1.9 Shadow modifiers Alpha BETA keepScreenOn modifier Jun 5 Jul 22 Sep 16 STABLE Visibility change modifier Material 3 Expressive 1.10 2D scroll APIs Window inset rulers Navigation 3 Unified @Preview annotation ALPHA BETA Sep 03 Nov 03 Veiled transitions STABLE Jan 13 Retain API Improved shared element transitions 1.11 Flexbox layout ALPHA Dec 15 Style API Grid layout BETA Mar API 26 mediaQuery v2 testing APIs STABLE May 13 New SlotTable implementation 25
20. New features in the last year 1.9 Shadow modifiers Alpha BETA keepScreenOn modifier Jun 5 Jul 22 Sep 16 STABLE Visibility change modifier Material 3 Expressive 1.10 2D scroll APIs Window inset rulers Navigation 3 Unified @Preview annotation ALPHA BETA Sep 03 Nov 03 Veiled transitions STABLE Jan 13 Retain API Improved shared element transitions 1.11 Flexbox layout ALPHA Dec 15 Style API Grid layout BETA Mar API 26 mediaQuery v2 testing APIs STABLE May 13 New SlotTable implementation 26
21. New features in the last year 1.9 Shadow modifiers Alpha BETA keepScreenOn modifier Jun 5 Jul 22 Sep 16 STABLE Visibility change modifier Material 3 Expressive 1.10 2D scroll APIs Window inset rulers Navigation 3 Unified @Preview annotation ALPHA BETA Sep 03 Nov 03 Veiled transitions STABLE Jan 13 Retain API Improved shared element transitions 1.11 Flexbox layout ALPHA Dec 15 Style API Grid layout BETA Mar API 26 mediaQuery v2 testing APIs STABLE May 13 New SlotTable implementation 27
22. New features in the last year 1.9 Shadow modifiers Alpha BETA keepScreenOn modifier Jun 5 Jul 22 Sep 16 STABLE Visibility change modifier Material 3 Expressive 1.10 2D scroll APIs Window inset rulers Navigation 3 Unified @Preview annotation ALPHA BETA Sep 03 Nov 03 Veiled transitions STABLE Jan 13 Retain API Improved shared element transitions 1.11 Flexbox layout ALPHA Dec 15 Style API Grid layout BETA Mar API 26 mediaQuery v2 testing APIs STABLE May 13 New SlotTable implementation 28
23. New features in the last year 1.9 Shadow modifiers Alpha BETA keepScreenOn modifier Jun 5 Jul 22 Sep 16 STABLE Visibility change modifier Material 3 Expressive 1.10 2D scroll APIs Window inset rulers Navigation 3 Unified @Preview annotation ALPHA BETA Sep 03 Nov 03 Veiled transitions STABLE Jan 13 Retain API Improved shared element transitions 1.11 Flexbox layout ALPHA Dec 15 Style API Grid layout BETA Mar API 26 mediaQuery v2 testing APIs STABLE May 13 New SlotTable implementation 29
24. New features in the last year 1.9 Shadow modifiers Alpha BETA keepScreenOn modifier Jun 5 Jul 22 Sep 16 STABLE Visibility change modifier Material 3 Expressive 1.10 2D scroll APIs Window inset rulers Unified @Preview annotation Navigation 3 ALPHA BETA STABLE Sep 03 Nov 03 Veiled transitions Jan 13 Retain API Improved shared element transitions 1.11 Flexbox layout ALPHA Dec 15 Style API Grid layout BETA Mar API 26 mediaQuery v2 testing APIs STABLE May 13 New SlotTable implementation 30
25. Navigation 3 31
26. Navigation 3 • Compose-first Modernizing Preparing for Multiplatform Going Multiplatform 32
27. Navigation 3 • Compose-first Modernizing • Flexible Preparing for Multiplatform List<T> UI Going Multiplatform 33
28. Navigation 3 • Compose-first Modernizing • Flexible • Adaptive Preparing for Multiplatform Going Multiplatform 34
29. Navigation 3 • Compose-first Modernizing • Flexible • Adaptive Preparing for Multiplatform Going Multiplatform 35
30. Navigation 3 • Compose-first Modernizing • Flexible • Adaptive Preparing for Multiplatform • Multiplatform Going Multiplatform 36
31. Demo
32. Navigation 3 jb.gg/nav3 - browser 38
33. Navigation 3 resources jb.gg/compose - navigation jb.gg/nav3 - recipes 39
34. More about Navigation 3 40
35. @Preview 41
36. @Preview android androidx.compose.ui.tooling.preview.Preview common org.jetbrains.compose.ui.tooling.preview.Preview jvm androidx.compose.desktop.ui.tooling.preview.Preview 42
37. @Preview common androidx.compose.ui.tooling.preview.Preview common org.jetbrains.compose.ui.tooling.preview.Preview jvm androidx.compose.desktop.ui.tooling.preview.Preview 43
39. @Preview jb.gg/compose - previews 45
40. Compose Multiplatform for iOS isStable now 46
41. Compose Multiplatform for iOS is now er faster er glassier textinputier er 47
42. A { new | improved | parallel } rendering pipeline for iOS Default in 1.11 48
43. Previously… main GPU Snapshot / Layout Picture Wait for Drawable Submit commands Draw / Shaders screen 49
44. Parallel rendering main render GPU Snapshot / Layout Picture Wait for Drawable Submit commands Draw / Shaders screen 50
45. Parallel rendering + our own surface render GPU Snapshot / Layout Picture Wait for Drawable main Submit commands Draw / Shaders screen 51
46. Parallel rendering 20% faster in complex layouts 11% faster in complex Canvas drawing 52
47. New iOS APIs Overlaid interop views Truly-native text fields 53
48. Liquid Glass 54
51. Liquid Glass in Compose Multiplatform 57
52. Demo
53. Overlay interop views Experimental in 1.10 @OptIn ( ExperimentalComposeUiApi :: class ) @Composable actual fun PlatformActionButton ( onClick : () > Unit , modifier : Modifier , ){ UIKitView ( factory = { /* ... */ }, modifier = modifier , properties = UIKitInteropProperties placedAsOverlay = true , ), ) } ( 59
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. 60
55. 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. 61
56. jb.gg/compose - liquid - glass 62
57. iOS text input 63
58. Native iOS text input Experimental in 1.11 64
59. Native iOS text input Experimental in 1.11 65
60. Demo
61. Summarizing iOS Interop Perf Overlays Autosizi ng Native input methods 67
62. Summarizing iOS Interop Perf Overlays Autosizi ng Native input methods 68
63. Summarizing iOS Interop Perf Overlays Autosizing Native input methods 69
64. Compose Multiplatform for Web Beta 70
65. Demo
67. Summary Hundreds of millions of active users. Faster and faster release cycles. Constant improvements for all platforms. 74
68. Build your next app with shared UI with jb.gg/compose 75
69. Thank you; Come chat with us at the JetBrains booth! Márton Braun zsmb.co/talks zsmb.co/talks @zsmb.co Sebastian Aigner sebi.io @sebi.io sebi.io
70. Go back. 78
71. Okay you can stop now 79
72. Bullet points • One • Two • Three 126
73. Code slide @Composable fun HomeScreen( time: String, connected: Boolean, snackbarHostState: SnackbarHostState, ) { val coroutineScope = rememberCoroutineScope() } Column { coroutineScope.launch { val message = if (connected) "Connected and ready!" else "No connection :(" snackbarHostState.showSnackbar(message) } Text(text = "It's $time, a great time to order a pizza!") } 127
74. Title slide
75. Making an important point 129
76. Bottom up UI UI Presentation Presentation Business logic Business logic Data Data 130
77. Quick start • Ship almost immediately • Nontrivial moves • Fragmentation • Structural changes ? 131
78. Preparing for AGP 9 KMP requirements kotl.in/agp9 - blog 132
79. What we’re doing today Strategy Strategy Strategy Strategy 133