Conquering Offline App Sync Nightmares: Hybrid Logical Clocks and CRDTs to the Rescue

Many offline-first apps fail to deliver on their offline support promises, with data synchronization being a major hurdle. This article presents solutions: Hybrid Logical Clocks (HLCs) solve event ordering issues, ensuring consistent event sequencing across multiple devices even offline; Conflict-Free Replicated Data Types (CRDTs) tackle data conflict problems, such as the Last-Write-Wins (LWW) strategy, guaranteeing eventual data consistency. The author also recommends SQLite as the local database and introduces their built SQLite-Sync extension for simple and reliable cross-platform offline-first applications.