Why We Chose KMP Over Flutter for Mood Movies

When we started building Mood Movies at Mobile Byte Sensei, we evaluated every major cross-platform framework. Flutter, React Native, and Kotlin Multiplatform were all strong contenders. We chose KMP — and after 2 years of production experience, we'd make the same choice again. Here's why.

The Decision Framework

Our criteria were: native performance on all platforms, ability to share business logic without compromising UX, access to the full Kotlin ecosystem, and a migration path from our existing Android codebase. KMP checked every box.

Why Not Flutter?

Flutter is excellent for greenfield projects with uniform UI across platforms. But Mood Movies needed platform-specific behaviors — iOS haptics, Android material transitions, desktop keyboard shortcuts. With Flutter, we'd fight the framework to achieve native feel. With KMP + Compose MP, we share the logic and adapt the experience.

The KMP Advantage

KMP let us incrementally share code. We started with networking and data layers, then moved to shared ViewModels, and finally adopted Compose Multiplatform for UI. At no point did we have to rewrite everything — it was an additive process. Our shared code ratio grew from 30% to 85% over 6 months.

Results After 2 Years

Mood Movies runs on Android, iOS, and Desktop from a single codebase with 85% shared code. Feature development is 60% faster than maintaining separate native apps. Bug fixes ship to all platforms simultaneously. The Kotlin ecosystem gave us Ktor for networking, Koin for DI, and SQLDelight for persistence — all multiplatform from day one.