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A20 Pro and Vapor Chamber: Performance Rules for iPhone Duo Apps

What the A20 Pro, two bright displays, dual batteries, and vapor-chamber cooling mean for game, camera, AI, and media developers targeting iPhone Duo.

Nov 1, 2026

Developers•8 min read

Analytics for Foldable Layout Bugs: What iPhone Duo Developers Should Measure

Privacy-conscious signals for finding layout failures, abandoned workflows, crashes, and state loss without collecting screen content.

Nov 1, 2026

Developers•8 min read

A20 Pro and Vapor Chamber: Performance Rules for iPhone Duo Apps

Analytics for Foldable Layout Bugs: What iPhone Duo Developers Should Measure

How to Test an iPhone Duo App Without Owning the Device

SwiftUI Size Classes for iPhone Duo: Build for Space, Not Device Names

Running multiple windows on iPhone Duo with UIWindowSceneActivation

Accessibility on iPhone Duo: VoiceOver, Dynamic Type, and every device pose

The Foundation Models framework: on-device AI for iPhone Duo apps

Building adaptive layouts for iPhone Duo with ArrangementView

Virtual Front Camera and camera continuity across iPhone Duo's two displays

iPhone Duo App Store Connect checklist: screenshots, sizes, and submission

Why Apple wants you to stop designing for device poses

Migrating an existing iPhone app to iPhone Duo without a rewrite

iPhone Duo Split View: why some apps still show black bars around them

UIKit and UIScene on iPhone Duo: Modernize Before You Add Foldable Features

Xcode 27.1 Beta for iPhone Duo: The Test Matrix Your App Needs

Using iPhone Duo's hinge angle API without breaking your layout

Building for Two Displays on iPhone Duo: Scenes, Camera Preview, and Privacy

iOS 27 Edge-to-Edge Apps: Fix Letterboxing Before iPhone Duo Ships

App Store SEO for iPhone Duo: Keywords, Screenshots, and Conversion

iOS 27 Interactive Resizing on iPhone Duo: A Developer’s Guide

Building PromptSlate Studio — Part 10: What Xcode 27.1 and iOS 27.1 Mean Before Shipping for iPhone Duo

Building PromptSlate Studio — Part 9: Storing Video Projects Without Putting Movies in SwiftData

Building PromptSlate Studio — Part 6: Putting a Teleprompter on iPhone Duo's Outer Display

Building PromptSlate Studio — Part 7: On-Device Script Writing with Apple's Foundation Models

Building PromptSlate Studio — Part 8: Giving Script AI Image Context Without Inventing Product Facts

Building PromptSlate Studio — Part 4: A Teleprompter That Doesn't Change Speed with Refresh Rate

Building PromptSlate Studio — Part 5: Making the Teleprompter Follow the Speaker

Building PromptSlate Studio — Part 3: The AVFoundation Camera Engine Behind the UI

Building PromptSlate Studio — Part 2: Designing Compact, Expanded and Tabletop Layouts for iPhone Duo

Building PromptSlate Studio for iPhone Duo — Part 1: Why a Foldable iPhone Changes the Camera App

Should You Update an Existing iPhone App for iPhone Duo?

iPhone Duo Vertical Bars in iOS 27: What Changes in SwiftUI and UIKit

Official Apple Resources for iPhone Duo Developers

What the iPhone Duo Simulator Can—and Can’t—Test

Why macOS Tahoe 26.6 Is Required for Xcode 27.1 Beta

Why iOS 27.1 Matters for iPhone Duo Developers

The questions developers keep asking about building for iPhone Duo

iOS 27, Xcode 27.1 beta, and macOS Tahoe 26.6: what Duo developers need to know

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