Rankings
Top 20 repos in each star tier, ranked by AI quality score.
SQLDelight turns SQL schemas into typesafe Kotlin APIs with compile-time verification across platforms
Android reference app showcasing Clean Architecture, Compose, and modular Gradle setup for mid-to-senior developers
Android Jetpack's official source mirror: the development home for androidx.* libraries
JetBrains' official Kotlin serialization library: reflectionless, multiplatform, multi-format
Kickstarter's production Android app, open-sourced as a real-world Kotlin/RxJava reference
Flexible Android and Kotlin Multiplatform calendar library with full UI control
Koin brings lightweight, now compile-safe dependency injection to Kotlin and Kotlin Multiplatform
Loop Habit Tracker: A decade-old open source Android app with ~10K GitHub stars and strong grassroots adoption
The canonical registry of EVM chain metadata, now covering hundreds of networks
JetBrains' Kotlin-native ORM with dual DSL/DAO API reaches R2DBC support in 2026
Bitwarden's official Android app: open-source password manager with strong adoption signals
Square's Okio brings ergonomic, efficient I/O to Android, Java, and Kotlin Multiplatform
Open source Android file manager built on Linux syscalls with strict Material Design fidelity
FlorisBoard: open-source Android keyboard prioritizing privacy, still in beta after 6 years
Pokedex: A well-maintained Android architecture reference app featured in official Google documentation
Javalin: A no-magic, lightweight web framework for Java and Kotlin developers who want simplicity over convention
Android SIM country code spoofer works without root using Shizuku privilege bridge
Uber's RIBs framework brings business-logic-driven architecture to large-scale Android and iOS apps
Google's official Jetpack Compose extension lab: filling gaps before they reach AndroidX
Facebook's declarative Android UI framework trades view hierarchy depth for async layout performance