--- title: Kotlin 2.3.0, New Compose Features & More - Mobile Dev... description: Kotlin 2.3.0 introduces stable nested type aliases and data flow-based exhaustiveness checks for when expressions. Jetpack Compose December release brings... canonical: https://daily.dev/posts/kotlin-2-3-0-new-compose-features-more---mobile-dev-news-january-2026-9lybuzflj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Kotlin 2.3.0, New Compose Features & More - Mobile Dev News January 2026 | daily.dev og:description: Kotlin 2.3.0 introduces stable nested type aliases and data flow-based exhaustiveness checks for when expressions. Jetpack Compose December release brings... og:url: https://daily.dev/posts/kotlin-2-3-0-new-compose-features-more---mobile-dev-news-january-2026-9lybuzflj og:image: https://api.daily.dev/og/posts/9LybuZflj.png og:image:alt: Kotlin 2.3.0, New Compose Features & More - Mobile Dev News January 2026 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Kotlin 2.3.0, New Compose Features & More - Mobile Dev News January 2026 **[Philipp Lackner](https://daily.dev/sources/philipplackner)** · 16 min read · 3 upvotes · 0 comments ## Summary Kotlin 2.3.0 introduces stable nested type aliases and data flow-based exhaustiveness checks for when expressions. Jetpack Compose December release brings performance improvements matching Android Views, a new retain API for surviving configuration changes, and enhanced stack traces requiring Kotlin 2.3.0. Material 3 1.4 adds TextField state support, secure text field variants, and a horizontal carousel component. Media3 1.9.0 includes Compose UI integration with Material 3 widgets, metadata extraction via inspector, and automatic mute/unmute volume restoration. Android 16 QPR2 introduces expanded dark theme for light-only apps and developer verification requirements with ADB exemptions for local development builds. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Kotlin Weekly \#498](https://daily.dev/posts/kotlin-weekly-498-yydicmxue) · Kotlin Weekly · 0 upvotes · 0 comments - [What's new in the Jetpack Compose December '25 release](https://daily.dev/posts/what-s-new-in-the-jetpack-compose-december-25-release-tosr73rob) · Android Developers Blog · 7 upvotes · 0 comments --- Tags: [#mobile](https://daily.dev/tags/mobile), [#android](https://daily.dev/tags/android), [#kotlin](https://daily.dev/tags/kotlin), [#jetpack-compose](https://daily.dev/tags/jetpack-compose) [View this post on daily.dev](https://daily.dev/posts/kotlin-2-3-0-new-compose-features-more---mobile-dev-news-january-2026-9lybuzflj) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Kotlin 2.3.0, New Compose Features \u0026 More - Mobile Dev News January 2026","url":"https://daily.dev/posts/kotlin-2-3-0-new-compose-features-more---mobile-dev-news-january-2026-9lybuzflj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/kotlin-2-3-0-new-compose-features-more---mobile-dev-news-january-2026-9lybuzflj"},"datePublished":"2026-01-04T11:59:57.379Z","dateModified":"2026-01-04T12:05:40.839Z","description":"Kotlin 2.3.0 introduces stable nested type aliases and data flow-based exhaustiveness checks for when expressions. 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