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Xcode 27.1 Beta: Your App in the iPhone Duo Simulator

blakecrosley.com · published 21 September 2026

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https://developer.apple.com/news/releases/

developer.apple.com

https://developer.apple.com/help/app-store-connect/release-notes

developer.apple.com

https://developer.apple.com/documentation/xcode-release-notes/xcode-27_1-release-notes

developer.apple.com

https://developer.apple.com/documentation/swiftui/arrangementview

developer.apple.com

https://developer.apple.com/documentation/uikit/uiarrangementviewcontroller

developer.apple.com

https://developer.apple.com/documentation/swiftui/geometryproxy/reservedregions%28kind:options:layoutdirectionbehavior:%29

developer.apple.com

https://developer.apple.com/documentation/uikit/uiview/reservedregions%28kind:options:%29

developer.apple.com

https://developer.apple.com/documentation/swiftui/view/toolbarverticalbehavior%28_:%29

developer.apple.com

https://developer.apple.com/documentation/technologyoverviews/preparing-your-app-for-iphone-duo

developer.apple.com

Xcode 27.2 Is Out, but 27.1 Is Not, Which Means Developers Still Can’t Get Started on Duo-Adapted Apps Read at the source ↗

developer.apple.com

https://developer.apple.com/news/?id=rfb1rooi

developer.apple.com

https://developer.apple.com/design/human-interface-guidelines/designing-for-iphone-duo

developer.apple.com

https://www.apple.com/newsroom/2026/09/apple-unveils-iphone-duo/

apple.com

https://github.com/sven-ericmolzahn/iphone-duo-probe

github.com

iPhone Duo Simulator: Testing and optimizing your SwiftUI app Read at the source ↗