Developer Video Hub
iPhone Duo
Every official Apple Developer session on the foldable — embedded and ready to watch, no downloads, straight from Apple's channel.
iPhone Duo is Apple’s first foldable iPhone, unveiled September 9, 2026 and shipping October 23. This developer hub indexes every official Apple Developer session on the device — preparing your app, designing for the fold, adaptive layouts, multiple displays, camera and vertical bars — with session videos you can watch inline and written notes to read. Plus the full specification, launch prices across 20 countries, best apps for the foldable and free wallpapers.
Sessions — Apple Developer
Prepare your app for iPhone Duo
Start here — what the foldable changes for your shipping app.
More deep dives
Design for iPhone Duo
Strike a pose with adaptive layouts on iPhone Duo
Leverage multiple displays and scenes on iPhone Duo
Build a great camera experience for iPhone Duo
Raise the bar with iPhone Duo
Blog — written notes
Prepare Your App for iPhone Duo
Your iOS app already runs on the Duo — here's how to make it feel built for it, in the right order.
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Design for iPhone Duo
A device you can hold, prop on a table or fold — what that opens up, from Apple's design team.
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Strike a Pose: Adaptive Layouts
How your layout should respond to every pose and orientation of the fold.
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Multiple Displays & Scenes
Two displays at once — scenes, windows and how multitasking really works here.
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Great Camera Experience
Two front cameras and the outer display — a new class of camera UX.
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Raise the Bar: Vertical Bars
On iPhone Duo, bars move to the side. What that means for your UI.
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Three Levels of Duo Support
Letterboxed, status bar or edge-to-edge — the SDK you build against decides. Plus the timeline to October 23.
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The Questions Developers Ask
Resizability, portrait-only apps, both displays — 18 answers, each linked to the minute of Apple's Group Lab behind it.
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The iPhone Duo Simulator is here
Xcode 27.1 names the Duo Simulator runtime — and lists what still does not work in it.
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Which way does that camera face?
Direction, not position: the new camera APIs, the mirroring rules, and content on the outer display while you record.
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Apple's Three Steps to Get Ready NEW
Submissions are open, the device ships 23 October — the resizability skill, the patterns to remove, and how to test resizing.
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From the developer of this hub
Mac app · Developer Tools
RevDog: Indie Revenue
Revenue in your menu bar. If you ship apps — like the ones on this hub — RevDog keeps your RevenueCat numbers where you already look: today's revenue against yesterday and your recent average, MRR and active subscribers, and monthly progress against your own goal. Dig into purchases, renewals, trials and refunds with amounts, store commission, tax and net, filtered by project or transaction type. Native Mac interface with light and dark appearance, revenue charts with selectable date ranges, local caching with offline fallback, optional sales notifications. Credentials stay in the macOS Keychain — no developer-operated backend, no advertising, no analytics.
Mac · macOS 14 or later · English · one-time purchase, no subscription, no in-app purchases. Requires your own RevenueCat connection; a Demo Mode works without an account. Independent product, not affiliated with or endorsed by RevenueCat, Inc.
View on the Mac App Store →
Full specs · Prices by country · Best apps · Free wallpapers
Unofficial hub. Videos hosted on and streamed from YouTube (Apple Developer channel). Not affiliated with, endorsed by, or sponsored by Apple Inc.
Unofficial hub. Videos hosted on and streamed from YouTube (Apple Developer channel). Not affiliated with, endorsed by, or sponsored by Apple Inc.