Building a smart home app that controls lights, sensors, and devices in real-time using MQTT and Kotlin.
My dashboard was making 3 API calls sequentially. Users waited 3 seconds for no reason. Here's how async, Flow.zip, and Flow.combine actually differ.
I built a QR scanner app and users wanted scan history. Raw SQLite was painful. Room fixed that. Here's what actually matters when using Room in production.
40% of my users were stuck on a buggy version because auto-updates were off. In-app updates fixed that. Here's the implementation with proper state management.
Coroutines made my async Android code actually readable. Here's how I went from nested callbacks and Thread nightmares to clean, testable async logic - with real examples from production apps.
Building a multi-module Android app with complex navigation flows? Learn how to structure navigation using Jetpack Navigation Compose with type-safe routes, nested graphs, bottom navigation, and smooth transitions.
