Users expect iOS apps to work on flights, in low-signal areas, and during intermittent connectivity. Offline-first design is no longer optional for productivity and backup apps.
Core Data remains a strong choice for local persistence, while CloudKit can handle sync when configured carefully. The key is conflict resolution, background task planning, and transparent sync status in the UI.
At KraftCode, we ship offline-first patterns in apps like backup and vault products where reliability directly affects user trust and retention.