CommitPath: Learn Kotlin

CommitPath is a free, offline-first refresher for Kotlin and the tools around it. Open a flashcard for a quick definition and, where useful, a code example. Or follow a Guided lesson one Step at a time. Explore 26 topics, led by Kotlin, Kotlin Multiplatform, and Compose. The library also covers Android development, Kotlin and Android security, architecture, data structures, design patterns, testing, Ktor, Koin, Room, Git, Gradle, and more. Build personal decks from bundled cards, favorite lessons, and return to your last card or Step. Search topics, decks, lessons, and card prompts when you need a particular concept. All learning content is included with the app, so it works from first launch and offline. No account or subscription is required. Personal decks, favorites, and bookmarks stay on your device. CommitPath is made for a quick knowledge refresh, without quizzes or a prescribed path.