Kotlin Multiplatform has matured significantly. Compose Multiplatform for iOS reached stable in mid-2025. Major companies like Netflix, McDonald's, and Cash App are running KMP in production. It is no longer experimental - it is a legitimate platform choice.
What KMP does well in 2026
Shared networking, data models, and business logic genuinely reduce duplication. Compose Multiplatform now enables shared UI across Android and iOS with native rendering. For data-heavy apps with moderate UI complexity, KMP can share 50-70% of the codebase with no runtime performance penalty.
Where the friction still lives
Platform-specific APIs are where the abstraction leaks. GPS tracking, background services, Bluetooth, and camera integration require platform-specific implementations through expect/actual declarations. If your app is hardware-heavy, the shared percentage drops to 20-30% and the value proposition weakens.
The tooling reality
Debugging has improved but is not seamless. Xcode integration is better than it was in 2024, but iOS developers still need to understand Kotlin and the KMP build system. The learning curve is real for teams without Kotlin experience.
Our evaluation framework
We evaluate cross-platform tools on three criteria: what percentage of code can truly be shared for this specific project, what is the debugging experience when things go wrong, and can we hire developers who know this stack.
For projects with heavy platform API usage - real-time GPS, background services, hardware integration - native development often wins on speed and maintainability. For business apps with standard networking and UI patterns, KMP is now an excellent choice.
The bottom line
KMP in 2026 is production-ready and well-supported. The question is not whether it works, but whether your specific project benefits from shared code enough to justify the tooling investment. Run the numbers on your actual codebase before committing.