We will share our thought process on the business case of a multiplatform core for mobile apps, and why it might not make sense in some cases. We will also share our experience in incremental transition in a 9-month timeframe alongside product development in parallel, and a high-level glimpse of the architecture.

AppCore, our multi-platform framework:

The AppCore project powers the domain layer of both our Android and our iOS apps, and is enabled by Kotlin Multiplatform Mobile. It involves:

- A database-first, unidirectional data flow architecture, Kotlin Coroutines and SQLDelight.
- A strong emphasis on caching, synchronisation and persistence to facilitate the continuity and fluidity of our user experience.
- Various backend integrations through Apollo GraphQL, Google Cloud Firestore and WebSocket.