iOS 27 & UIScene support

The Customer.io Flutter SDK keeps working when your app adopts iOS's UIScene lifecycle or is built with Xcode 27. AppDelegate-only apps need no change.

customer_io 4.4.0 and newer keep Customer.io working when your Flutter app adopts iOS’s UIScene lifecycle or is built with Xcode 27.

• If your app keeps the AppDelegate-only lifecycle, no change is required.
• Flutter’s UIScene APIs are available from Flutter 3.38 and become the default in 3.41. Customer.io supports scene hosts on Flutter 3.44.8 or newer. The same version contains a separate Xcode 27 build-tool fix. AppDelegate-only apps keep the published customer_io minimum.
• Under UIScene, Customer.io push and in-app destinations route through Flutter automatically when the standard UIApplicationSceneManifest is present and Flutter deep linking is enabled. Ordinary links stay owned by Flutter; Customer.io unwraps and attributes Live Activity links, then hands the destination to your Dart router.
• Live Activity scene attribution also needs the opt-in Live Activities module and a scene-delegate-capable registrar (Flutter 3.44.8+).

See the iOS 27 UIScene migration guide for step-by-step Flutter instructions.