Written Notes
iPhone Duo Blog
Readable summaries — not transcripts — of every Apple Developer session on the foldable. Watch or read, your call.
Blog · 6 October
Preparing your app for iPhone Duo — Apple's three steps
Submissions are open and the device ships 23 October. Apple's readiness guide is now live: the resizability skill, the
UIScreen.main and orientation patterns to remove, and three ways to test resizing.…Read →
Blog · 6 October
Which way does that camera face? The new Duo camera APIs
A camera's position no longer tells you which way it points. The direction coordinator, the mirroring rules, and putting a script on the outer display while you record.…
Read →
Blog · 18 September
The iPhone Duo Simulator is here in Xcode 27.1 beta
Xcode 27.1 beta names the iPhone Duo Simulator runtime in its release notes — and lists what still does not work inside it. The first build with the iOS 27.1 SDK, and what it changes for the Duo.…
Read →
Blog · 17 September
iPhone Duo: the questions developers actually ask
Can resizability be turned off? What happens to a portrait-only app? Who gets both displays? Our answers, with each claim linked to the minute of Apple's Group Lab that backs it.…
Read →
Blog · 10 September
Three Levels of Duo Support — and What to Do Before Xcode 27.1
Letterboxed, status-bar or edge-to-edge: what your app looks like depends on the SDK you built against. Plus the timeline to October 23.…
Read →
Blog · 15m session
Raise the Bar: Vertical Bars on iPhone Duo
: [Raise the bar with iPhone Duo (Apple Developer)](https://www.youtube.com/watch?v=2y6xvya0b8M) · 15 min* By Anna (UI Frameworks) and Maria (HID).…
Read →
Blog · 9m 28s session
Build a Great Camera Experience for iPhone Duo
: [Build a great camera experience for iPhone Duo (Apple Developer)](https://www.youtube.com/watch?v=8mNyxpsx7fY) · 9 min 28s* By Tarun (Camera Software team).…
Read →
Blog · 7m 18s session
Leverage Multiple Displays & Scenes on iPhone Duo
: [Leverage multiple displays and scenes on iPhone Duo (Apple Developer)](https://www.youtube.com/watch?v=Biqw19XiqQY) · 7 min 18s* By Chris Donegan (UI Frameworks) and A…
Read →
Blog · 18m session
Strike a Pose: Adaptive Layouts for iPhone Duo
: [Strike a pose with adaptive layouts on iPhone Duo (Apple Developer)](https://www.youtube.com/watch?v=d1xi9GAfSRI) · 18 min* By Maria (HID) and Harry (UI Frameworks).…
Read →
Blog · 10m 45s session
Design for iPhone Duo
: [Design for iPhone Duo (Apple Developer)](https://www.youtube.com/watch?v=do3UqxfYc3I) · 10 min 45s* By Marcos and Vince, Apple's design team.…
Read →
Blog · 10m session
Prepare Your App for iPhone Duo
: [Prepare your app for iPhone Duo (Apple Developer)](https://www.youtube.com/watch?v=qsd-VwqmZvI) · 10 min* iPhone Duo is Apple's first folding, multi-display iPhone. Th…
Read →
From the developer of this hub
Mac app · Developer Tools
RevDog: Indie Revenue
Revenue in your menu bar. If you ship apps, 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. 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 →