Kotlin Multiplatform Development

iOS & Android
From Shared
Business Logic

CrestCoder builds iOS and Android apps with Kotlin Multiplatform — share business logic across platforms, native UI on each. Google-backed, production-ready since 2026. No performance penalty. Code once, deploy everywhere.

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60-80%

Code shared across platforms

100%

Native performance

Countries served

Kotlin Multiplatform in 2026

Production-ready code sharing
without compromise

Kotlin Multiplatform moved out of "experimental" in 2025. Google officially backs it. Compose Multiplatform stabilized on iOS. Companies like Netflix, H&M, and 9GAG ship KMP apps to millions of users. The question is no longer "is it ready?" — it's "when do we start sharing code?"

60-80% code shared

Business logic, API integration, caching, validation, analytics — everything platform-agnostic lives in shared Kotlin code.

Native UI on each platform

SwiftUI for iOS, Jetpack Compose for Android — your app looks and feels native on each platform.

Zero performance penalty

Compiles to native via LLVM. Same performance as writing in Swift or Kotlin natively.

Incremental adoption

Add KMP to existing Android apps gradually. Extract shared logic layer by layer. No big rewrites.

What We Build

Kotlin Multiplatform
development services

KMP Apps from Scratch

Build new iOS and Android apps with shared Kotlin business logic — lower cost, faster time-to-market.

Android to KMP Migration

Extract shared logic from existing Android apps, compile to iOS — incremental adoption, no rewrites.

Shared Business Logic

API integration, caching, pagination, offline sync, analytics, validation — all in shared Kotlin code.

Native UIs (SwiftUI + Compose)

Platform-specific UIs that look and feel native — SwiftUI for iOS, Jetpack Compose for Android.

App Design & Architecture

Clean separation of shared logic and platform UI — designed for maintainability and incremental scaling.

Maintenance & Support

Monthly retainers covering iOS/Android updates, feature additions, and shared logic improvements.

KMP in Production

Apps we've built
with shared logic

Do Grocer Delivery

On-Demand · Marketplace

Do Grocer — On-Demand Grocery Delivery

Challenge

A grocery delivery startup needed iOS and Android apps with real-time tracking, order sync, and inventory management — two platforms, same business logic underneath.

Solution

We built with Kotlin Multiplatform — shared business logic for order management, inventory sync, and analytics. SwiftUI for iOS, Jetpack Compose for Android. 75% code shared across platforms.

75% SharedBusiness logic

Native UISwiftUI + Compose

View Full Case Study →

Logistics Delivery

Logistics · Real-Time

Logistics Delivery — Real-Time GPS Tracking

Challenge

A courier company needed iOS and Android delivery apps with live GPS tracking, proof-of-delivery, and offline capability — complex shared workflows across both platforms.

Solution

Kotlin Multiplatform for shared tracking logic, offline queue, and sync. SwiftUI and Compose UIs. Result: 70% code shared, single source of truth for delivery state.

70% SharedTracking & sync logic

OfflineQueue-based sync

View Full Case Study →

View All Case Studies

Why CrestCoder

KMP teams
that deliver

Google-backed officially

We build on KMP with confidence — Google officially supports it for production Android/iOS development.

Proven shipping experience

We've shipped KMP apps to production — we know the real-world edge cases and best practices.

Architecture-first approach

We design for code sharing from day one — clean separation of shared logic and platform UIs.

Incremental adoption experts

Can add KMP to existing Android apps gradually — no big rewrite needed, lower risk.

How We Work

Our KMP
development process

Discovery & architecture

Map shared vs platform-specific code, design the KMP layer, decide on incremental vs greenfield approach.

Shared logic design

Clean Kotlin business logic layer — API, caching, validation, analytics, database. Platform-agnostic.

Native UIs in parallel

iOS team builds SwiftUI, Android team builds Jetpack Compose — both consume the same shared Kotlin layer.

Testing & integration

Unit tests on shared logic, integration tests across both platforms, profiling for performance.

Launch & scale

App Store and Play Store submission, then grow shared logic as new features land.

Questions?

Frequently
asked

Still have questions? Contact us directly.

What is Kotlin Multiplatform (KMP)?+

Kotlin Multiplatform is an official framework (supported by Google) that lets you write shared business logic once in Kotlin and deploy it on both Android and iOS. The UI layer stays native — SwiftUI for iOS, Jetpack Compose for Android. You get code sharing without sacrificing native performance.

Is KMP production-ready?+

Yes. In 2026, KMP is officially production-ready and supported by Google. Compose Multiplatform became stable on iOS in 2025. Companies like Netflix, H&M, 9GAG, and Quizlet ship KMP apps in production.

How much code can you actually share?+

Typically 60-80% of business logic is shareable: API integration, caching, pagination, offline sync, analytics, validation, repository patterns. UI stays platform-native. The exact percentage depends on your app's architecture.

KMP vs React Native vs Flutter — which should I choose?+

KMP when you want native UI/UX on each platform plus code sharing. React Native when you need one codebase and don't need ultra-high performance. Flutter for graphics-heavy apps. We recommend based on your specific requirements.

Can you add KMP to an existing Android app?+

Yes — KMP supports incremental adoption. You can extract shared business logic into a KMP module and gradually migrate more code. No need to rewrite everything at once.

How do you price a KMP app?+

Most projects are quoted as fixed price after discovery. A standard KMP app typically starts around $10,000-$20,000. Apps with complex features or significant code sharing usually run $20,000-$55,000+, depending on scope.

Ready?

Tell us about
your app idea

We reply within 24 hours with an honest estimate and timeline — no obligation.

iOS & AndroidFrom SharedBusiness Logic

Production-ready code sharingwithout compromise