Realm to SwiftData Migration — Reference Guide

Purpose: Complete migration path from Realm to SwiftData Swift Version: Swift 5.9+ (Swift 6 with strict concurrency recommended) iOS Version: iOS 17+ (iOS 26+ recommended) Context: Realm Device Sync sunset Sept 30, 2025. This guide is essential for Realm users migrating before deadline.

Critical Timeline

Realm Device Sync DEPRECATION DEADLINE = September 30, 2025

If your app uses Realm Sync:

• ⚠️ You MUST migrate by September 30, 2025
• ✅ SwiftData is the recommended replacement
• ⏰ Time remaining: Depends on current date, but migrations take 2-8 weeks for production apps

This guide provides everything needed for successful migration.