Which data persists after app
Generated on 3/19/2025
1 search
In the context of Apple's WWDC sessions, data persistence in apps is primarily discussed in relation to SwiftData. SwiftData is a framework that facilitates the building of an app's model layer and ensures its persistence across app launches. This includes features like modeling, schema migration, graph management, and synchronization with CloudKit.
Persistent data in SwiftData is managed through a combination of model contexts and data stores. The data store is responsible for fetching and saving all the data required to support persistent models. SwiftData also supports history tracking, which allows apps to query and process changes over time, providing a way to track model changes and manage persistent history.
For more detailed information on how SwiftData handles data persistence, you can refer to the session What’s new in SwiftData (00:01:01) which covers the adoption of SwiftData and its persistence capabilities. Additionally, the session Create a custom data store with SwiftData (00:01:21) provides insights into how custom data stores can be implemented to manage persistent data.
Platforms State of the Union
Discover the newest advancements on Apple platforms.
Track model changes with SwiftData history
Reveal the history of your model’s changes with SwiftData! Use the history API to understand when data store changes occurred, and learn how to use this information to build features like remote server sync and out-of-process change handing in your app. We’ll also cover how you can build support for the history API into a custom data store.
Create a custom data store with SwiftData
Combine the power of SwiftData’s expressive, declarative modeling API with your own persistence backend. Learn how to build a custom data store and explore how to progressively add persistence features in your app. To get the most out of this session, watch “Meet SwiftData” and “Model your schema with SwiftData” from WWDC23.
Meet FinanceKit
Learn how FinanceKit lets your financial management apps seamlessly and securely share on-device data from Apple Cash, Apple Card, and more, with user consent and control. Find out how to request one-time and ongoing access to accounts, transactions, and balances — and how to build great experiences for iOS and iPadOS.
What’s new in location authorization
Location authorization is turning 2.0. Learn about new recommendations and techniques to get the authorization you need, and a new system of diagnostics that can let you know when an authorization goal can’t be met.
Get started with HealthKit in visionOS
Discover how to use HealthKit to create experiences that take full advantage of the spatial canvas. Learn the capabilities of HealthKit on the platform, find out how to bring an existing iPadOS app to visionOS, and explore the special considerations governing HealthKit during a Guest User session. You’ll also learn ways to use SwiftUI, Swift Charts, and Swift concurrency to craft innovative experiences with HealthKit.
What’s new in SwiftData
SwiftData makes it easy to add persistence to your app with its expressive, declarative API. Learn about refinements to SwiftData, including compound uniqueness constraints, faster queries with #Index, queries in Xcode previews, and rich predicate expressions. Join us to explore how you can use all of these features to express richer models and improve performance in your app. To discover how to build a custom data store or use the history API in SwiftData, watch “Create a custom data store with SwiftData” and “Track model changes with SwiftData history”.
Customize feature discovery with TipKit
Focused on feature discovery, the TipKit framework makes it easy to display tips in your app. Now you can group tips so features are discovered in the ideal order, make tips reusable with custom tip identifiers, match the look and feel to your app, and sync tips using CloudKit. Learn how you can use the latest advances in TipKit to help people discover everything your app has to offer.