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Advances in Apple Watch give you more ways to communicate to and from your app, and new audiences to consider. Learn what strategies are available for data communication and how to choose the right tool for the job. Compare and contrast the benefits of using technologies such as iCloud Keychain, Watch Connectivity, Core Data, and more.

Discover how you can integrate data from Bluetooth accessories into Apple Watch apps and complications. Bluetooth devices can provide medical data, sports stats, and more to Apple Watch, and help people get more out of your software in the process. We’ll show you how to connect to these devices during Background App Refresh to display the most up-to-date information in your Apple Watch complications, provide an overview of Core Bluetooth on watchOS, and explore best practices for Bluetooth accessory design.

App Clips give people the power to discover and download a small part of your app at a moment’s notice to complete tasks and transactions. Explore tips and best practices to help you create compact App Clips that emphasize modern features and elegant design. Learn how you can build reliable and secure App Clips to ensure that people can always access your experience when scanning a physical App Clip Code or viewing it through your website. And we’ll take you through specific strategies for testing an App Clip before releasing it to the world.

Learn how to easily build apps that share data between multiple iCloud users with NSPersistentCloudKitContainer. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data.