Philipp Lackner

Runique. I built a running tracker app for phones and smartwatches.

CryptoTracker. I built an app that tracks cryptocurrency prices and your portfolio.

Chirp. Kotlin

Bookpedia. I built a book app that runs on Android, iOS, and desktop from one codebase.

Jetpack Compose Masterclass. I created a complete course for building Android apps with Compose.

Ivy Wallet. I built a free app to track spending and manage personal finances.

Chirp. I built a real-time messaging backend with Kotlin and Spring Boot.

Meme Creator. I made a meme creator app that works on iPhone and Android.

EchoJournal. Kotlin

Nav3Guide. I built a multiplatform app template that runs on Android, iOS, and desktop.

Spring Boot Crash Course. I built a crash course teaching Spring Boot and Kotlin.

Translator KMM. I built a translator that runs on iPhone, Android, and web.

Coroutines Masterclass. I made a complete guide to writing code that handles multiple tasks smoothly.

CleanErrorHandling. Kotlin

RecordScreen. I built a tool that records Android phone screens as videos.

Connection Observer. I made a tool that watches when your device loses internet.

TypeSafe Compose Navigation. I built a type-safe navigation system for Android Compose apps.

CMP Ktor. I built a template for writing apps that run on Android, iPhone, and desktop.

Contacts Compose. I built a contacts app that runs on all platforms from one codebase.

Video Calling App Stream SDK. I built a toolkit for adding video calls to Android apps.

CameraX Guide. I made a guide to adding camera features to Android apps.

BiometricAuth. I wrote sample code for adding fingerprint unlock to Android apps.

Gradle Module Manager. I built a tool for organizing large Android projects into separate modules.

Push Notify. I built a tool that sends phone notifications the easy way.

Testing Course. I created a course teaching Kotlin developers how to test their apps.

Landmark Recognition. I built an app that identifies famous landmarks from photos.

Bluetooth Chat. I built an app that lets phones message each other over Bluetooth.

PDF Renderer. I made a tool that displays PDFs as images in Android apps.

Swipe to Delete. I built a swipe-to-delete gesture tool for Android lists.

Pull to Refresh. I built a pull-to-refresh gesture for mobile apps.

Animated Splash Screen. I made an animated splash screen example for Android apps.

CMP Koin DI. I made a dependency injection tool for Kotlin Multiplatform apps.

Room Guide. I built an Android app that guides you through indoor spaces.

Decompose Navigation. I built a template for sharing app code between Android and iOS.

Compose Google Sign In. I built a working example of Google sign-in for Android apps.

Compose Paging Caching. I built a tool that loads and caches large lists for Android apps.

WeatherApp. I built a weather app that shows you forecasts on Android.

Dependency Injector. I wrote a guide for organizing how app pieces connect.

Clean Architecture Note App. I built a note app that demonstrates clean architecture in Kotlin.

Permissions Guide. I made a guide for building Android apps that ask for phone permissions correctly.

Screen Data. I built a guide for sharing data between Android app screens.

GraphQL Countries App. I built a mobile app that fetches country data from GraphQL.

Stock Market App. I built a stock market simulator for learning to trade.

NoteAppKMM. I built a note app that runs on phones and computers with shared code.

Background Location Tracking. I built a tool that tracks device location while apps run in the background.

CalorieTracker. I built a calorie tracking app for Android phones.

AndroidCrypto. Kotlin

M3-BottomNavigation. Kotlin

Nested Navigation Graphs Guide. I made a guide for organizing nested navigation in Android apps.

Cryptocurrency App. I built a cryptocurrency price tracker app in Kotlin.