MOBILE APP DEVELOPMENT
Kotlin/Native: Building Native Applications with Shared Kotlin Code
Learn how Kotlin/Native compiles Kotlin into native binaries, how it fits into Kotlin Multiplatform, and when shared code can help your application team.
fun greeting() {
return "Hello, native!"
}● Shared Kotlin logic
● iOS◆ Android▣ NativeK
KOTLIN NATIVE EXPLAINED
What is Kotlin/Native?
Kotlin/Native is a technology that compiles Kotlin code into native binaries that run without a Java Virtual Machine (JVM). It uses an LLVM-based compiler backend and a native implementation of the Kotlin standard library.
It is designed for targets where a virtual machine is not available or desirable, including Apple platforms and selected desktop, server, and embedded environments. Kotlin/Native can also integrate with existing native code and platform frameworks.
In simple terms: Kotlin/Native lets developers write Kotlin code and compile it into platform-specific native output, rather than relying on a JVM at runtime.
01 / THE TECHNOLOGY
How Kotlin/Native works
Kotlin source code is analyzed and compiled for a selected target. Kotlin/Native uses LLVM infrastructure to generate native machine code and supporting runtime components for that platform.
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Depending on the target and build configuration, output may include an executable, library, or framework. For Apple applications, Kotlin code can be packaged as a framework and consumed by native app code.
02 / SHARED DEVELOPMENT
Kotlin/Native and Kotlin Multiplatform
Kotlin/Native is one of the technologies used by Kotlin Multiplatform (KMP). KMP allows teams to share selected code across platforms while retaining the option to build platform-specific user interfaces and integrations.
Kotlin Multiplatform
A development approach for sharing code—such as business rules, data models, validation, and networking—across supported targets.
Kotlin/Native
A compiler technology that produces native binaries for supported targets and enables integration with native platform APIs.
A team may share business logic between Android and iOS while building the user interface with each platform’s preferred tools. The amount of code shared is a project decision; not every part of an app must be common.
03 / TARGETS
Supported platforms
Kotlin/Native supports multiple target families. Support level, host requirements, testing availability, and compatibility guarantees vary by target and Kotlin release. Confirm the current support matrix before committing to a production architecture.
Not every target has the same maturity or build-host support. Building final Apple binaries requires macOS with Xcode and its command-line tools. Review the official target support table when selecting a platform.
04 / PROJECT STRUCTURE
Designing a Kotlin Multiplatform application
A maintainable multiplatform project separates portable code from code that depends on a specific operating system. Common code often contains business logic, models, validation, and shared data operations; platform-specific source sets connect to native APIs and app frameworks.
Example: a simple shared function
A function that does not depend on platform-specific APIs can live in a common source set and be compiled for each configured target.
// commonMain/kotlin/Greeting.kt
class Greeting {
fun message(): String {
return "Hello from shared Kotlin code"
}
}When a feature needs platform functionality—such as secure storage, camera access, notifications, or device services—the implementation can be provided through platform-specific code or a suitable multiplatform library.
05 / IMPLEMENTATION
Typical development workflow
Define what to share
Identify business logic, models, validation, and data operations that should be reused.
Configure targets and source sets
Set up the Kotlin Multiplatform Gradle project and organize common and platform-specific code.
Connect native functionality
Integrate platform APIs, native libraries, and application interfaces where required.
Build and test each target
Compile for supported targets and validate shared logic and platform-specific behavior.
Release and maintain
Package required binaries or frameworks, document setup, and monitor compatibility.
06 / PLANNING
Benefits and considerations
Share selected business rules and data operations instead of maintaining separate copies.
Connect Kotlin code with supported native APIs, libraries, and frameworks.
Keep native interfaces or choose a shared UI approach based on product needs.
Compile code into native artifacts for configured targets without a JVM at runtime.
What teams should plan for
- Some libraries and APIs are platform-specific and cannot be used directly in common code.
- Build environments and toolchains differ by target; Apple binaries require macOS and Xcode.
- Shared code still needs testing on each supported platform, especially native integrations.
- Compiler, plugin, dependency, and target support can change between releases.
07 / APPLICATIONS
Where Kotlin/Native can be useful
Shared mobile business logic
Reuse validation, calculations, data models, and selected service-layer logic in Android and iOS apps.
Native library integration
Use existing C libraries or connect Kotlin code with supported Apple frameworks and native app code.
Cross-platform product modules
Build a shared module for selected targets while preserving platform-specific experiences.
Kotlin/Native is not automatically the right choice for every project. Consider target support, team skills, existing code, library availability, performance needs, and long-term maintenance.
COMMON QUESTIONS
Frequently asked questions
Is Kotlin/Native the same as Kotlin Multiplatform?
No. Kotlin Multiplatform is the broader technology for sharing code across platforms. Kotlin/Native is the compiler technology used to produce native binaries for supported targets.
Does Kotlin/Native require the JVM?
No. Kotlin/Native compiles Kotlin code into native binaries that run without a JVM.
Can Kotlin/Native be used for iOS development?
Yes. Kotlin/Native supports Apple targets, and Kotlin code can be integrated with iOS applications through supported framework interoperability. Building final Apple binaries requires macOS and Xcode.
Can Android and iOS share the same user interface?
They can share a UI with an appropriate multiplatform UI framework, or share only business logic and keep native Android and iOS interfaces.
Is Kotlin/Native suitable for every mobile app?
Not necessarily. Suitability depends on requirements, platform integrations, dependencies, target support, team experience, and maintenance plans.
Build a mobile solution around your product goals
Kotlin/Native and Kotlin Multiplatform give teams options for sharing code while retaining native platform capabilities. A thoughtful architecture starts by deciding which parts benefit from reuse and which should remain platform-specific.
