Offline-First Mobile App Design
summary
Explains building iOS apps that work when the network is optional by using a big sync endpoint with timestamps for delta updates, local persistence via Swift Data/core data, and optimistic UI updates that generate client-side IDs and validate before server reconciliation. Covers CRDTs as message-based replication (send increment / insert messages), per-field timestamps and merge pitfalls like cycles and garbled text, and when Firebase or CloudKit are acceptable shortcuts.
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chapters (9)
- 0:00Introduction and context
- 1:13The case for offline mode
- 4:27Defining offline first
- 6:12Basic principles and sync
- 9:02Delta updates
- 12:23Optimistic UI updates
- 17:09Solving conflicts with CRDT
- 26:05Summary and best practices
- 29:02Q&A session
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