Updates

Current launch information and developer readiness

Updated the topic hub and seven guides with dated Apple launch information, toolchain availability, TestFlight support, design references and current web-engine guidance.

Separated Apple’s inner-display hardware specification from design-canvas pixel estimates, expanded vertical-bar guidance, and retained the compact safe-area table and light syntax highlighting. This is a documentation update; the Playground and its renderer were not changed.

A search-intent-based iPhone Duo topic cluster

The iPhone Duo publication now gives Xcode 27.1, Simulator, Safe Area, Adaptive Layout, App Testing, WebView, Resources, and the Playground distinct canonical roles inside one topic cluster.

Legacy guide and Playground URLs permanently redirect to the new canonical structure. HTML remains the searchable primary representation while Markdown remains a noindex machine-readable alternate.

A workspace for adaptive experiences

The iPhone Duo Playground brings together an interactive note example, adjustable device environments, external previews and spatial inspection. Its geometry and interactions are illustrative, with explicit limits for each content source.

English-first publication & data-driven languages

The publication now uses English throughout its pages, tools, exports, and discovery formats. Shared templates and complete locale packs support additional languages without duplicating pages.

This is a language and website-architecture revision, not a new round of iOS device testing. Existing source-review dates and verification limits remain explicit.

The first iPhone Duo guides and tools

Established six core guides, a primary-source register, an adaptation checklist, and a web layout experiment. Reworked the main site around technical field guides.

Review scope: public pages and selected official video transcripts. No Xcode, Device Hub, or iPhone Duo device tests. Group Labs were checked at description level; the HIG entry was identified, not fully reviewed.