Getting started
Xcode 27.1 requirements & setup
Choose the iPhone Duo toolchain using Apple’s current hub, compare Xcode 27.1 beta with 27.2 beta 2, and check host requirements, TestFlight eligibility and dated limitations.
FOR DEVELOPERS / IPHONE DUO
Build for iPhone Duo.
Choose the native toolchain, then check layout and WebView references with their version and experiment conditions.
Start here
Start with one useful task
Prepare the environment
Check the dated toolchain comparison, matching SDK/runtime and requirements before changing your setup.
Xcode 27.1 requirements & setupRun in Xcode Simulator
Follow the native setup and testing path, distinct from the online preview.
Xcode Simulator setup & testingPlan the checks
Turn layout and interaction questions into an explicit test plan.
App testing checklist
FOR DEVELOPERS / IPHONE DUO
Find a useful resource
Getting started
Xcode Simulator setup & testing
Set up the iPhone Duo Simulator in Xcode 27.1 beta. Install the runtime, open Device Hub and test native apps across display, fold and orientation changes.
Testing
App testing checklist
A practical iPhone Duo app testing matrix for compatibility, fold/unfold, orientation, resizing, state restoration, safe areas, keyboard, navigation, WebView, camera, media, and regression evidence.
Design
Safe area insets & layout margins
Read iPhone Duo safe-area references with their display, orientation and source conditions. Separate layout points, hardware pixels, margins and runtime reserved regions.
Design
Adaptive layout guide
Plan iPhone Duo compositions around the current window, navigation and task. Distinguish display examples from runtime size classes, reserved regions and native adaptation.
WebView
WKWebView, viewports & keyboards
Coordinate native and web layout while resizing, preserve input and scroll state, and distinguish default behavior from opt-in Safari experiments. Includes a Vue example.
Resources
Official resources & source index
Find iPhone Duo design sessions, UI kits, presentation assets, native toolchain updates and selected Apple Staff answers, with dates and verification limits.
Design the controls, not just the canvas
Use Apple’s toolbar session to plan control groups, ordering and overflow, then turn those questions into a design-review worksheet.