Apple's foldable iPhone launches October 23, 2026. The simulator ships in the Xcode 27.1 beta — here's how to install it, the exact device geometry, and how to make your app fold-aware before launch day.
Get the iPhone Duo device type running in Xcode 27.1 beta, step by step.
Read the guide →Exact points, pixels, scale factors and size classes for both displays.
See the specs →Everything to verify before your app meets a folding iPhone.
Open the checklist →Drop a screenshot, get it framed in an iPhone Duo — open or closed. Plus a free Pro Pack download (HD frames, specs cheat sheet, checklist).
Generate a mockup →Copy-paste code for the fold: pose detection, hinge-safe layout, live fold transitions, and dual-pose previews.
Get the snippets →Yes. The beta installs an iPhone Duo device type (com.apple.CoreSimulator.SimDeviceType.iPhone-Duo, model iPhone19,4) which requires the iOS 27.1 runtime, downloaded separately. Note the 27.2 beta does not include it — Apple points developers at the 27.1 beta for iPhone Duo SDK and simulator support.
Install Xcode 27.1 beta, download the iOS 27.1 runtime with xcodebuild -downloadPlatform iOS, then pick the iPhone Duo device in Device Hub, where poses (open / closed / folded) are buttons. Full guide →
Not from Apple — the simulator ships only inside Xcode 27.1 beta and runs Apple's iOS 27.1 runtime. For a quick visual check you can use our mockup generator, or the Previews canvas Display group in the beta.
Outer display: 466 × 678 points (1398 × 2034 px @3x). Inner display: 669 × 951 points (2007 × 2853 px @3x). Full spec table →
Apple says existing apps keep working. Apps built with the iOS 27 SDK get better resizing behavior; building against the iOS 27.1 SDK unlocks the full screen space. Either way, test the fold — layouts that assume a fixed size will break. Checklist →