Kotlin Multiplatform Development: Build Cross-Platform Apps for Android, iOS, Web, and Desktop

Unlock the true power of Kotlin to write once and run everywhere. In Kotlin Multiplatform Development, veteran software architect Stokes J. Harrett shows you step-by-step how to share business logic across Android, iOS, Web, and Desktop-without sacrificing native performance or user experience.

Why This Book Matters
- Maximize Code Reuse: Master Kotlin Multiplatform (KMP) to consolidate networking, data models, and business rules into a single, maintainable codebase.
- Native-Level UIs: Leverage Jetpack Compose Multiplatform for Android and Desktop, Swift/SwiftUI for iOS, and Compose for Web-delivering truly native interfaces on every platform.
- Robust Toolchain: Integrate industry-leading libraries-Ktor for networking, SQLDelight for local storage, Koin for dependency injection, and kotlinx.serialization for seamless data parsing.

What You'll Build

• Cross-Platform Mobile Apps: Combine shared Kotlin logic with Android Studio and Xcode tooling.

• Responsive Web Interfaces: Utilize Kotlin/JS and Compose for Web to develop interactive browser applications.

• Desktop Applications: Create JVM-based desktop apps using Compose for Desktop and native packaging.

• Full-Stack Sync: Implement offline-first data caching and cloud synchronization with Ktor backends.

Key Features & Benefits

• Clean Architecture & Modular Design: Organize code into domain, data, and presentation layers for maximum testability and scalability.

• Expect/Actual Abstractions: Harness Kotlin's expect/actual mechanism to bridge platform-specific APIs-camera, file I/O, notifications-while keeping shared code platform-agnostic.

• Comprehensive Testing Strategy: Build unit and integration tests that run across JVM, Native, and JS targets using kotlin.test, MockK, and Ktor's MockEngine.

• CI/CD and Publishing: Automate builds, tests, and artifact publishing to Maven Central and CocoaPods with Gradle and GitHub Actions.

About the Author
Stokes J. Harrett is a seasoned Kotlin engineer and published author with over a decade of experience building multi-device applications for top-tier enterprises. His expertise spans Android, iOS, web, and backend systems, making him uniquely qualified to guide you through the complexities of Kotlin Multiplatform development.

Who Should Read This Book

• Android & iOS Developers eager to share business logic without rewriting.

• Full-Stack Engineers looking to unify client-server code in Kotlin.

• Team Leads & Architects designing scalable, maintainable codebases for multiple platforms.

• Independent Developers & Startups aiming for rapid time-to-market and reduced maintenance overhead.

Perception of Time
Whether you're under tight deadlines or planning a long-term project, this book's concise, example-driven chapters let you absorb essential KMP skills in days, not weeks. Strategic sidebars and real-world case studies accelerate your learning curve, turning complex cross-platform scenarios into clear, actionable code.