Build KMP Offline-First Apps
summary
Claims ability to get iOS and Android syncing in about two days by wiring a Ditto SDK into a Kotlin Multiplatform app; core uses a Rust engine exposed via C FFI, Ditto multiplexes Bluetooth LE, Wi‑Fi aware/Direct and LAN transports, and provides diff‑based sync using CRDTs. Main friction is iOS bridging—Objective‑C vs Swift compatibility, CocoaPods/Gradle quirks with Kotlin 2—and some demo devices show UI/connection flakiness, but the replication and offline‑first mesh behavior fundamentally works.
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chapters (18)
- 0:00Offline-first apps intro
- 2:12Peer-to-peer data sharing
- 3:57Local network connections
- 6:23Bluetooth for sync
- 8:31Choosing transport
- 9:34Conflict resolution
- 10:37Ditto SDK replication
- 12:42CRDTs explained
- 14:07KMP support in Ditto
- 17:40KMP compiler backends
- 19:44Setting up dependencies in Kotlin Multiplatform
- 21:50iOS CocoaPods integration
- 24:43Expect/actual in KMP
- 26:09Objective-C to Kotlin bridge
- 27:34KMP evaluation for Ditto
- 28:15Live peer-to-peer sync demo
- 31:50Summary and KMP future
- 32:11Q&A: IDE and iOS compilation
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