Sync Data in the Background - Swift SDK
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Realm is now Atlas Device SDK – Learn More
Sync Changes in the Background
If you want your app to update data in the background (while the app is minimized), iOS requires you to implement Background App Refresh. Enabling Background App Refresh minimizes the time it takes for the user to see the most recent data; without Background App Refresh, Realm updates the data when the user launches the app, potentially resulting in noticeable lag.
To use the realm while the device is locked, you must adjust the file protection settings. See Use Realm When the Device Is Locked.
For an example of how to sync changes in the background using the
SwiftUI BackgroundTask API, see: Sync Data in the Background with
SwiftUI.