KMP Tutorial: From Zero to Production

Complete source code for the KMP Tutorial series on kemalcodes.com.

A step-by-step Kotlin Multiplatform tutorial that takes you from your first shared function to publishing a real cross-platform app on Android and iOS. 20 tutorials with working code.

How to Use This Repo

Each tutorial has its own branch. Switch to the branch you want:

git clone https://github.com/kemalcodes/kmp-tutorial.git
cd kmp-tutorial

# Switch to a specific tutorial
git checkout tutorial-06-ktor

The main branch contains the base KMP project. Tutorial branches build on top of it.

Tutorials

Part 1: Foundations

#	Tutorial	Branch	Article
1	What is Kotlin Multiplatform?	—	Read
2	Setting Up Your First KMP Project	—	Read
3	KMP Project Structure	—	Read
4	Compose Multiplatform	—	Read
5	KMP vs Flutter vs React Native	—	Read

Part 2: Core Libraries

#	Tutorial	Branch	Article
6	Ktor Client — Networking	tutorial-06-ktor	Read
7	SQLDelight — Database	tutorial-07-sqldelight	Read
8	DataStore — Storage	tutorial-08-datastore	Read
9	Koin — Dependency Injection	tutorial-09-koin	Coming soon
10	Shared ViewModel	tutorial-10-viewmodel	Coming soon

Part 3: Architecture & Patterns

#	Tutorial	Branch	Article
11	Clean Architecture	tutorial-11-architecture	Coming soon
12	Navigation	tutorial-12-navigation	Coming soon
13	Testing	tutorial-13-testing	Coming soon
14	Error Handling & Logging	tutorial-14-error-handling	Coming soon

Part 4: Build a Real App

#	Tutorial	Branch	Article
15	Planning — Notes App	tutorial-15-app-planning	Coming soon
16	Data Layer	tutorial-16-data-layer	Coming soon
17	UI Layer	tutorial-17-ui-layer	Coming soon
18	Publishing	tutorial-18-publishing	Coming soon

Part 5: Advanced

#	Tutorial	Branch	Article
19	Desktop & Web	tutorial-19-desktop-web	Coming soon
20	Migrating Android to KMP	tutorial-20-migration	Coming soon

Project Structure

kmp-tutorial/
├── shared/                 ← Shared Kotlin code
│   └── src/
│       ├── commonMain/     ← Code for ALL platforms
│       ├── androidMain/    ← Android-specific code
│       └── iosMain/        ← iOS-specific code
├── composeApp/             ← Android app (Compose UI)
│   └── src/
├── iosApp/                 ← iOS app (Xcode project)
├── build.gradle.kts
└── settings.gradle.kts

Tech Stack

• Kotlin Multiplatform — shared business logic
• Compose Multiplatform — shared UI (optional)
• Ktor — networking
• SQLDelight — database
• DataStore — key-value preferences
• Koin — dependency injection
• Kotlin Serialization — JSON parsing

Requirements

• Android Studio (latest stable)
• Xcode (for iOS builds — Mac required)
• JDK 17+

Run the Project

Android

./gradlew :composeApp:assembleDebug

Or use the run configuration in Android Studio.

iOS

Open iosApp/iosApp.xcodeproj in Xcode and run on a simulator.

Blog

All tutorials with detailed explanations at kemalcodes.com/kmp-tutorial

License

MIT