Kotlin and Android (developer.android.com)

Google’s official “Kotlin-first” landing page for Android — the vendor-side companion to the neutral kotlin (Wikipedia) summary. Regraded T1 on 2026-08-05: it is a first-party vendor doc, which the tier ladder grades primary, and the same policy that put the official language sites at T1 applies here. Tier is distance from the source, not credibility — the adoption and crash-rate numbers below are Google’s own, uncontrolled and unaudited, and the page exists to recommend a language Google ships. (Flagged for the curator: the 2026-08-05 decision named official language sites; extending it to a vendor platform doc is my reading and is easy to reverse.) Where the encyclopedic source frames Kotlin as a multi-target language, this frames it as the recommended Android language and backs the pitch with adoption numbers.

What Google claims

• Kotlin-first positioning — “the modern, recommended language for Android,” used by over 60% of professional Android developers.
• Safety payoff, quantified — Android apps using Kotlin are “20% less likely to crash,” credited to null safety (SDK nullability annotations from API 28 / Android 9).
• Jetpack Compose — “Android’s modern UI toolkit built on Kotlin”; modern Android UI is now Kotlin-native. (A Kotlin-built UI framework — the Android sibling of Flutter; a cross-spoke thread toward ../ui-frameworks-wiki if a Compose source arrives.)
• Kotlin Multiplatform — share logic across Android/iOS/desktop.
• Tooling — Android Studio’s first-class support (Java→Kotlin conversion, “Show Kotlin Bytecode”), Android KTX idiomatic extensions, Kotlin API docs, and the in-browser Kotlin Playground.
• Java interop for gradual migration — explicit “Kotlin for Android Java developers” guides.

Named adopters: Slack, Lyft, Robinhood, Netflix, Airbnb, Twitter, Dropbox, Pinterest, Reddit, Duolingo, and others.

Tier & standing

T2 — authoritative on Google’s own stance but promotional (a first-party “adopt this” page); the 60% / 20%-fewer-crashes figures are Google’s own. It corroborates and sharpens the Android angle on kotlin rather than adding new language substance.

Related

kotlin · jetbrains · google · developer-tooling · flutter