Kotlin

Why Compose Multiplatform Is a Strategic Advantage

For teams already invested in Kotlin and Jetpack Compose, Compose Multiplatform is the most natural path to cross-platform development. You keep your existing skills, architecture patterns, and much of your codebase, and extend it to iOS, web, and desktop.

Leverage Your Kotlin Investment

If your team already builds Android with Kotlin and Jetpack Compose, CMP means they can build for iOS and other platforms without learning a new language or framework. Same Compose UI model, same coroutines, same architecture patterns, applied everywhere.

Incremental Adoption

Unlike Flutter or React Native, KMP does not require a rewrite. Start by moving shared business logic (networking, data models, validation) into a multi-platform module. Add shared UI with Compose Multiplatform when you are ready. Adopt at your own pace without disrupting your existing apps.

Native Where It Matters

KMP's expect/actual mechanism lets you share code where it makes sense and drop into native platform code where it does not. Need UIKit for a specific iOS screen? Need a platform-specific sensor API? CMP makes that natural, not a workaround.

One Language, Full Stack

Kotlin runs on the JVM, compiles to native iOS code, transpiles to JavaScript, and runs on the server with Ktor. A single language across your mobile apps, web frontend, and backend means fewer context switches, simpler hiring, and more code sharing.

Backed by JetBrains and Google

Kotlin is developed by JetBrains and officially supported by Google for Android. Compose Multiplatform builds on Jetpack Compose Google's modern UI toolkit. You are building on a technology stack with strong institutional backing and a growing ecosystem.

Proven at Scale

KMP is used in production by Netflix, Cash App, Philips, VMware, and others. Compose Multiplatform for iOS reached stable in 2024. The technology is production-ready, and the ecosystem is maturing rapidly with Navigation 3, shared resources, and platform-specific integration APIs.

KMP and CMP: Understanding the Layers

Kotlin Multiplatform (KMP) and Compose Multiplatform (CMP) are related but distinct. Understanding the difference helps you decide how much to share across platforms.

Kotlin Multiplatform (KMP) Shared Logic

KMP lets you share business logic in Kotlin across platforms, networking, data models, validation, state management. Your iOS app uses the shared Kotlin code compiled to native, while keeping a SwiftUI or UIKit interface. This is the safest starting point: high code sharing, zero UI risk.

Compose Multiplatform (CMP) - Shared UI

CMP extends KMP by sharing the UI layer too, using Jetpack Compose to render on iOS, desktop, and web. If your team already builds Android UI with Compose, CMP means that same UI code runs on iOS. The tradeoff is less platform-specific UI polish, which matters more for some apps than others.

Incremental Path

Most teams start with KMP (shared logic only), then evaluate CMP for new screens or features. This lets you validate the approach with low risk before committing to shared UI. We help you decide where the line should be for your specific product and team.

Platform-Specific When Needed

KMP's expect/actual mechanism makes it natural to drop into Swift on iOS or Kotlin on Android for platform-specific features. Unlike some cross-platform frameworks, you are never fighting the system to access native capabilities. We build the native integrations that make your shared code work seamlessly on each platform.

Growing Ecosystem

The KMP/CMP ecosystem is maturing fast. Navigation 3 brings modern navigation patterns, shared resources handle images and strings across platforms, and libraries like Ktor, SQLDelight, and Koin provide multiplatform-ready infrastructure. JetBrains and Google are actively investing in making KMP a first-class development experience.

Server-Side Kotlin Too

KMP does not stop at mobile. Shared Kotlin modules can also be consumed by Ktor backend services, meaning your data models, validation logic, and business rules stay consistent across mobile apps, web, and server. One language, one source of truth, from client to server.

Why Native Expertise Makes Our CMP Work Better

Many teams exploring CMP come from an Android background and struggle with the iOS side. We bring expert-level knowledge of both platforms, which is exactly what CMP projects need.

iOS Integration Depth

When your CMP app needs HealthKit, Core Location, or UIKit interop, you need someone who knows iOS at the native level. We build the Swift-side integrations that make your Kotlin Multiplatform code work correctly on Apple platforms, handling the edge cases that documentation does not cover.

Android Platform Expertise

Our Android team has been building with Kotlin since it was announced for Android, and with Jetpack Compose since its alpha. We bring deep understanding of Android architecture components, lifecycle management, and the Compose rendering model that CMP builds on.

Navigation and Architecture

We wrote about Navigation 3 for Compose Multiplatform and have practical experience with the architectural decisions that make or break CMP projects, state management patterns, navigation strategies, and how to structure expect/actual declarations for maintainability.

Honest Framework Guidance

We build with Flutter, React Native, native iOS, native Android, and CMP. We recommend CMP when it genuinely fits your situation, not because it is the only tool we know. If another approach would serve you better, we will tell you.

Build Tooling and CI/CD

Testing Across Platforms

We write shared tests in common Kotlin code that run on every target platform, supplemented by platform-specific tests where behavior differs. Our testing strategy catches cross-platform issues early, before they reach your users on iOS or Android.

Compose Multiplatform Questions, Answered

KMP and CMP are newer to the cross-platform landscape, and there are legitimate questions about maturity, tradeoffs, and when it makes sense. Here are the answers to what CTOs, technical co-founders, and engineering leaders ask us most often.

How does Compose Multiplatform compare to Flutter and React Native?

All three are cross-platform frameworks, but they excel in different situations. Flutter uses Dart with its own rendering engine, more mature cross-platform ecosystem, consistent rendering, and typically the best choice for greenfield projects. React Native uses JavaScript/TypeScript and is ideal for teams with React expertise who want to share code with a React web app. CMP uses Kotlin with Jetpack Compose, better for teams already invested in Kotlin/Android, easier incremental adoption into existing native apps, and direct access to platform APIs through expect/actual. CMP often wins when you have an existing Android codebase or strong Kotlin team. We have deep experience with all three and help you choose the right fit.

Is Compose Multiplatform production-ready?

Yes. Kotlin Multiplatform has been stable since late 2023 and is used in production by Netflix, Cash App, Philips, and others. Compose Multiplatform for iOS reached stable in 2024. The ecosystem is maturing quickly, Navigation 3, shared resources, and platform-specific integration APIs are improving with each release. We have been building with KMP and CMP since their early days and have practical experience with real-world tradeoffs.

Can we adopt Kotlin Multiplatform incrementally?

Yes, this is KMP's biggest advantage over other cross-platform approaches. Start by moving shared business logic (networking, data models, validation) into a KMP module. Your existing Android and iOS apps consume this module while keeping their native UIs. Add shared UI with CMP later if it makes sense. No rewrite required, and you validate the approach with low risk.

What is our team only knows Android/Kotlin?

That is actually an ideal starting point for CMP. Your team's existing Kotlin and Compose skills transfer directly. The iOS-specific work (Xcode configuration, platform integrations, App Store submission) is where our iOS expertise fills the gap. We handle the Apple-side complexity while your team focuses on the shared Kotlin code they already know.

How does KMP handle iOS platform features?

Through the expect/actual mechanism. You declare an expected interface in shared code, then provide actual implementations in platform-specific code, Swift/Objective-C on iOS, Kotlin on Android. This means you can access any iOS API (HealthKit, Core Location, UIKit) from your shared codebase. As native iOS experts, we build these platform integrations correctly and handle the edge cases.

Should we use KMP (shared logic only) or CMP (shared UI too)?

It depends on your product. KMP with native UIs (SwiftUI + Compose) gives you the most platform-authentic experience with significant code sharing on the logic side. CMP adds shared UI, which is ideal when UI consistency across platforms matters more than platform-specific polish. Many teams start with KMP and selectively adopt CMP for screens where shared UI makes sense. We help you find the right balance.

How does Navigation 3 work in Compose Multiplatform?

Navigation 3 is the latest navigation solution for Jetpack Compose, and it works with Compose Multiplatform. Our team has written about the migration path from Navigation 2 and the practical considerations for multiplatform navigation. We set up navigation architecture that scales with your app and handles the platform-specific navigation patterns (back gestures, deep links) correctly on each platform.

How do I plan and scope a Compose Multiplatform project?

Redesigned Caregiver App to Improve Efficiency and Patient Focus

Modernized Mobile Experience for Iconic Retail Market

Bringing Cincinnati’s Arts Scene to Life Through a Modern Mobile Experience

Scaled AI Forecasting with a Production-Ready Platform

Internal Recognition and Rewards Platform

Enabled a local AI Education startup to scale