The State of Kotlin Multiplatform in 2026: A Production Perspective

After 4 years of shipping KMP apps to production, here's our honest assessment of what works, what doesn't, and where the ecosystem is heading. Mobile Byte Sensei has built 6 products with KMP — this is what we've learned.

What Works Brilliantly

Shared business logic is KMP's killer feature. Networking (Ktor), serialization (kotlinx.serialization), DI (Koin), and local storage (SQLDelight) all work flawlessly across platforms. Compose Multiplatform for shared UI has reached production quality for most use cases. The Kotlin language itself continues to be a joy to write.

What Needs Work

iOS debugging can still be painful. Xcode integration is improving but not seamless. Some third-party libraries still lack KMP support. Build times for large projects need optimization. The web target is functional but not yet production-ready for complex apps.

Our Recommendation

If you're starting a new mobile project in 2026, KMP should be your default choice. The ecosystem is mature enough for production, the developer experience is solid, and the community is growing fast. For existing Android apps, incremental migration is straightforward — start with shared data layers and expand from there.