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Apple Revamps iOS 27 for iPhone Duo Foldable, Adds Apple Pencil Support

🔄 Updated 12h ago — new reporting from 9to5Mac
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Key points

  • iOS 27 controls moved to the side for easier access on iPhone Duo.
  • App layouts adjust for the iPhone Duo's larger internal and external screens.
  • iPhone Duo supports Apple Pencil on both displays.
  • Content shifts away from the fold when the inner display is partially open.
  • iPhone Duo allows users to run multiple apps simultaneously.
  • iPhone Duo's inner display is 7.6 inches.
  • iPhone Duo displays two home screens' worth of space when open.
  • iPhone Duo supports Split View for side-by-side app resizing.
  • Apps targeting iOS 26 will fit in a safe area with a black background.
  • Apps updated for iOS 27 use more of the iPhone Duo display.
  • Apps made for iOS 27.1 will fully utilize the iPhone Duo display.
  • iPhone Duo has exclusive camera software features like Smart Take and Kid Cue.
  • iPhone Duo's Main camera lacks the variable aperture of iPhone 18 Pro.
  • The folding display has an under-display camera for a cutout-free inner screen.
  • iPhone Duo will be eSIM-only globally.
  • iPhone Duo supports the USB-C Apple Pencil.
  • iPhone Duo ships with iOS 27.1.
  • iPhone Duo will be available starting October 23.
  • Apple CEO John Ternus criticized Android foldables for letterboxing apps.
  • iPhone Duo will display unoptimized apps with black bars on its foldable screen.
  • Apple introduced two new iPhone 18 Pros.
  • Apple introduced two new Apple Watches.
  • Apple introduced an updated pair of AirPods at a lower price.
  • iPhone Duo is a book-style foldable.
  • iPhone Duo is slightly wider and shorter than the Samsung Galaxy Z Fold 8.
  • A user recreated the iPhone Duo's unfolding animation on a Galaxy Z Fold 8.
  • iPhone Duo's software polish makes existing hardware features feel new.
  • iPhone Duo's app dock shifts to the side when open.
  • iPhone Duo has three tiers of app compatibility.
  • iOS 27 is released on Monday.
  • Apple is accepting app submissions built for iOS 27.
  • Apple CEO John Ternus and head of marketing Greg Joswiak discussed iPhone Duo leaks.
  • Greg Joswiak stated competitors copied the iPhone Duo's aspect ratio.
  • The iPhone Duo's folding nano-texture display remained a secret during development.
  • Apple CEO John Ternus criticized plastic surfaces on Android foldables like the Pixel 11 Pro Fold.
  • Apple CEO John Ternus and SVP of Marketing Greg Joswiak were interviewed by Tom's Guide and TechRadar.
  • iPhone Duo allows saving app pairs for later swapping.
  • iPhone Duo allows split-screening a video with an app.
  • Craig Federighi is Apple's SVP of Software Engineering.
  • Craig Federighi was interviewed by MKBHD.
  • Craig Federighi discussed the iPhone Duo's overlap with the iPad mini.
  • iPhone Duo and Samsung Galaxy Z Fold 8 are priced $100 apart.
  • Samsung Galaxy Z Fold 8 is thinner when folded and unfolded.
  • Samsung Galaxy Z Fold 8 has an IP48 rating.
  • iPhone Duo is fully waterproof and dustproof.
  • iPhone Duo has 48MP main and ultrawide cameras.
  • Samsung Galaxy Z Fold 8 has 50MP main and ultrawide cameras.
  • Neither iPhone Duo nor Samsung Galaxy Z Fold 8 has a telephoto lens.
  • Samsung Galaxy Z Fold 8 has a 10MP outer selfie camera.
  • iPhone Duo has a 12MP outer selfie camera.
  • Apple Reference Image verifies photo authenticity against AI modifications.
  • Apple Reference Image provides an unalterable record for photos.
  • Apple Reference Image is an anti-AI photo editing feature for iPhone 18.
  • iPhone Duo has a split keyboard UI in horizontal mode on its folding display.
  • iPhone Duo's outer display makes one-handed typing easier than expected.
  • iPhone Duo's vertical unfolded mode offers a great typing experience.
  • Tom Marieb is Apple's VP of Hardware Engineering.
  • Tom Marieb discussed the iPhone Duo's durability, hinge, and display crease.
  • The iPhone Duo's nano-texture minimizes the visible crease after extended use.
  • iPhone Duo requires apps to be recompiled for iOS 27.0 or 27.1.
  • Apps need iOS 27.1 to use the Duo's new tab bar and UI components.
  • iPhone Duo is the first iPhone with iPad-inspired multitasking.
  • Samsung Galaxy Z Fold 3 first added stylus support in 2022.
  • Samsung Galaxy Z Fold 7 ditched S Pen support.
  • Apple originally wanted to make a dedicated Apple Pencil for iPhone Duo.
  • Developers need to use Xcode 27.1 to take full advantage of iPhone Duo's screen space.
  • Apps built with older Xcode versions do not extend beneath the status bar and camera areas.
  • Developers should avoid relying on fixed iPhone screen dimensions like UIScreen.main.bounds.
  • Developers should use standard layout containers like SwiftUI stacks and UIKit Auto Layout.
  • iPhone Duo's left side is a flat edge due to the hinge.
  • iPhone Duo's right side has curved corners.
  • The dock is on the right side of the iPhone Duo's display.
  • Tom Hitchins posted a video of left-handed iPhone Duo use on Instagram.
  • Apple used "Duo" for its 1992 PowerBook Duo.
  • Apple used "Duo" for its 2020 MagSafe Duo Charger.
  • iPhone Duo has five new StandBy mode views: Home Camera, Home Modular, Flow, Fade, and Snoopy.
  • iPhone Duo's StandBy mode works when not charging.
  • iPhone Duo's StandBy mode can display a single camera feed or a grid of camera feeds.
  • iPhone Duo's StandBy mode allows custom smart home controls.
  • Leaker pdfu discovered new StandBy views in Apple code.
  • Vidit Bhargava created the app Duo-Man.
  • Duo-Man simulates a classic Walkman experience.
  • Duo-Man won second place at the Bitrig hackathon.
  • Duo-Man uses the Duo's dual screens to mimic inserting a cassette and playing music.
  • Duo-Man incorporates recorded button clicks and static noise from a real Walkman.
  • iPhone Duo has a 5.4-inch outer display.
  • Apple provides an API for developers to access the iPhone Duo's hinge angle.
  • The hinge angle API has an accuracy of approximately five degrees.
  • The API allows developers to read the iPhone Duo's 'pose' information.
  • The outer screen defocuses into a preview of the inner screen as the iPhone Duo opens.
  • HomePad will use the Home app for setup.
  • HomePad will include a Photo Face StandBy option.
  • HomePad will launch on October 13.
  • HomePad has a design based on the iMac G4.
  • iPhone Duo has a replaceable cover layer on its folding display.
  • Kate Bergeron is Apple's VP of Hardware Engineering.
  • Apple launched a 'Shot on iPhone Duo' campaign on Instagram.
  • The campaign features six photos from photographers Jake Michaels and Jason Nocito.
  • iPhone Duo has a 12-megapixel front camera.
  • iPhone Duo pre-orders start Friday, October 16.

iOS 27 Redesigned for Foldable Form Factor

Apple has revamped iOS 27 specifically for the iPhone Duo, its first foldable phone. The redesign addresses the additional screen real estate and multitasking capabilities offered by a foldable device. This adaptation draws on Apple's existing experience with iPadOS, which already supports multitasking on larger screens.

Optimized Controls and App Layouts

The traditional iOS 27 controls have been repositioned to the side of the screen when the iPhone Duo is open, making them more accessible for thumb use. Additionally, iOS 27 automatically adjusts the layout of every application to utilize the increased interior screen space and the wider aspect ratio of the external display.

Apple Pencil Integration

The iPhone Duo marks the first time an iPhone will support Apple Pencil. Users will be able to use the Apple Pencil on both the outer and inner displays. While the device will support Apple Pencil with USB-C, this feature may not be available at launch and is expected to be rolled out later in the year.

Adaptive Display Functionality

Given the iPhone Duo's unique multi-screen and flexible display, Apple has implemented features to ensure usability in various orientations. When the inner display is partially folded like a book, iOS 27 moves content away from the fold to maintain visibility. The device can also be folded into a tent-like position, allowing users to watch videos on the external screen.

Updates

🕒 2026-10-02 · new reporting from 9to5Mac
  • Apple launched a 'Shot on iPhone Duo' campaign on Instagram.
  • The campaign features six photos from photographers Jake Michaels and Jason Nocito.
  • iPhone Duo has a 12-megapixel front camera.
  • iPhone Duo pre-orders start Friday, October 16.
🕒 2026-10-01 · new reporting from 9to5Mac
  • iPhone Duo has a replaceable cover layer on its folding display.
  • Kate Bergeron is Apple's VP of Hardware Engineering.
🕒 2026-10-01 · new reporting from 9to5Mac
  • HomePad will use the Home app for setup.
  • HomePad will include a Photo Face StandBy option.
  • HomePad will launch on October 13.
  • HomePad has a design based on the iMac G4.
🕒 2026-09-29 · new reporting from 9to5Mac
  • Apple provides an API for developers to access the iPhone Duo's hinge angle.
  • The hinge angle API has an accuracy of approximately five degrees.
  • The API allows developers to read the iPhone Duo's 'pose' information.
  • The outer screen defocuses into a preview of the inner screen as the iPhone Duo opens.
🕒 2026-09-28 · new reporting from TechCrunch
  • Vidit Bhargava created the app Duo-Man.
  • Duo-Man simulates a classic Walkman experience.
  • Duo-Man won second place at the Bitrig hackathon.
  • Duo-Man uses the Duo's dual screens to mimic inserting a cassette and playing music.
  • Duo-Man incorporates recorded button clicks and static noise from a real Walkman.
  • iPhone Duo has a 5.4-inch outer display.
🕒 2026-09-28 · new reporting from 9to5Mac
  • iPhone Duo has five new StandBy mode views: Home Camera, Home Modular, Flow, Fade, and Snoopy.
  • iPhone Duo's StandBy mode works when not charging.
  • iPhone Duo's StandBy mode can display a single camera feed or a grid of camera feeds.
  • iPhone Duo's StandBy mode allows custom smart home controls.
  • Leaker pdfu discovered new StandBy views in Apple code.
🕒 2026-09-27 · new reporting from Engadget
  • Apple used "Duo" for its 1992 PowerBook Duo.
  • Apple used "Duo" for its 2020 MagSafe Duo Charger.
🕒 2026-09-25 · new reporting from 9to5Mac
  • iPhone Duo's left side is a flat edge due to the hinge.
  • iPhone Duo's right side has curved corners.
  • The dock is on the right side of the iPhone Duo's display.
  • Tom Hitchins posted a video of left-handed iPhone Duo use on Instagram.
🕒 2026-09-24 · new reporting from InfoQ
  • Developers need to use Xcode 27.1 to take full advantage of iPhone Duo's screen space.
  • Apps built with older Xcode versions do not extend beneath the status bar and camera areas.
  • Developers should avoid relying on fixed iPhone screen dimensions like UIScreen.main.bounds.
  • Developers should use standard layout containers like SwiftUI stacks and UIKit Auto Layout.
🕒 2026-09-21 · new reporting from 9to5Google
  • Samsung Galaxy Z Fold 3 first added stylus support in 2022.
  • Samsung Galaxy Z Fold 7 ditched S Pen support.
  • Apple originally wanted to make a dedicated Apple Pencil for iPhone Duo.
🕒 2026-09-21 · new reporting from Engadget
  • iPhone Duo is the first iPhone with iPad-inspired multitasking.
🕒 2026-09-19 · new reporting from 9to5Mac
  • iPhone Duo requires apps to be recompiled for iOS 27.0 or 27.1.
  • Apps need iOS 27.1 to use the Duo's new tab bar and UI components.
🕒 2026-09-18 · new reporting from 9to5Mac
  • Tom Marieb is Apple's VP of Hardware Engineering.
  • Tom Marieb discussed the iPhone Duo's durability, hinge, and display crease.
  • The iPhone Duo's nano-texture minimizes the visible crease after extended use.
🕒 2026-09-18 · new reporting from 9to5Mac
  • iPhone Duo has a split keyboard UI in horizontal mode on its folding display.
  • iPhone Duo's outer display makes one-handed typing easier than expected.
  • iPhone Duo's vertical unfolded mode offers a great typing experience.
🕒 2026-09-14 · new reporting from ZDNET
  • Apple Reference Image verifies photo authenticity against AI modifications.
  • Apple Reference Image provides an unalterable record for photos.
  • Apple Reference Image is an anti-AI photo editing feature for iPhone 18.
🕒 2026-09-14 · new reporting from 9to5Mac
  • iPhone Duo and Samsung Galaxy Z Fold 8 are priced $100 apart.
  • Samsung Galaxy Z Fold 8 is thinner when folded and unfolded.
  • Samsung Galaxy Z Fold 8 has an IP48 rating.
  • iPhone Duo is fully waterproof and dustproof.
  • iPhone Duo has 48MP main and ultrawide cameras.
  • Samsung Galaxy Z Fold 8 has 50MP main and ultrawide cameras.
  • Neither iPhone Duo nor Samsung Galaxy Z Fold 8 has a telephoto lens.
  • Samsung Galaxy Z Fold 8 has a 10MP outer selfie camera.
  • iPhone Duo has a 12MP outer selfie camera.
🕒 2026-09-13 · new reporting from 9to5Mac, 9to5Google
  • Craig Federighi is Apple's SVP of Software Engineering.
  • Craig Federighi was interviewed by MKBHD.
  • Craig Federighi discussed the iPhone Duo's overlap with the iPad mini.
🕒 2026-09-12 · new reporting from 9to5Mac
  • iPhone Duo allows saving app pairs for later swapping.
  • iPhone Duo allows split-screening a video with an app.
🕒 2026-09-11 · new reporting from 9to5Google
  • Apple CEO John Ternus criticized plastic surfaces on Android foldables like the Pixel 11 Pro Fold.
  • Apple CEO John Ternus and SVP of Marketing Greg Joswiak were interviewed by Tom's Guide and TechRadar.
🕒 2026-09-11 · new reporting from The Verge
  • Apple CEO John Ternus and head of marketing Greg Joswiak discussed iPhone Duo leaks.
  • Greg Joswiak stated competitors copied the iPhone Duo's aspect ratio.
  • The iPhone Duo's folding nano-texture display remained a secret during development.
🕒 2026-09-10 · new reporting from 9to5Mac, 9to5Google, The Verge, Engadget
  • A user recreated the iPhone Duo's unfolding animation on a Galaxy Z Fold 8.
  • iPhone Duo's software polish makes existing hardware features feel new.
  • iPhone Duo's app dock shifts to the side when open.
  • iPhone Duo has three tiers of app compatibility.
  • iOS 27 is released on Monday.
  • Apple is accepting app submissions built for iOS 27.
🕒 2026-09-10 · new reporting from 9to5Google, 9to5Mac
  • Apple introduced two new iPhone 18 Pros.
  • Apple introduced two new Apple Watches.
  • Apple introduced an updated pair of AirPods at a lower price.
  • iPhone Duo is a book-style foldable.
  • iPhone Duo is slightly wider and shorter than the Samsung Galaxy Z Fold 8.
🕒 2026-09-10 · new reporting from 9to5Google
  • Apple CEO John Ternus criticized Android foldables for letterboxing apps.
  • iPhone Duo will display unoptimized apps with black bars on its foldable screen.
🕒 2026-09-09 · new reporting from Engadget, 9to5Mac
  • iPhone Duo allows users to run multiple apps simultaneously.
  • iPhone Duo's inner display is 7.6 inches.
  • iPhone Duo displays two home screens' worth of space when open.
  • iPhone Duo supports Split View for side-by-side app resizing.
  • Apps targeting iOS 26 will fit in a safe area with a black background.
  • Apps updated for iOS 27 use more of the iPhone Duo display.
  • Apps made for iOS 27.1 will fully utilize the iPhone Duo display.
  • iPhone Duo has exclusive camera software features like Smart Take and Kid Cue.
  • iPhone Duo's Main camera lacks the variable aperture of iPhone 18 Pro.
  • The folding display has an under-display camera for a cutout-free inner screen.
  • iPhone Duo will be eSIM-only globally.
  • iPhone Duo supports the USB-C Apple Pencil.
  • iPhone Duo ships with iOS 27.1.
  • iPhone Duo will be available starting October 23.

✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →

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How outlets covered it

Apple launched a new 'Shot on iPhone Duo' campaign on Instagram, featuring six photos from photographers Jake Michaels and Jason Nocito. This campaign highlights the camera capabilities of the new iPhone Duo, which includes 48-megapixel rear cameras and a 12-megapixel front camera.

Apple's iPhone Duo includes a replaceable cover layer on its folding display, designed to mitigate the visibility of creases over time. This feature allows users to maintain the display's appearance, addressing a common durability concern with foldable devices.

A leaker discovered details about the HomePad's setup process and a shared feature with the iPhone Duo. The HomePad will use the Home app for setup and include a Photo Face StandBy option, similar to the unannounced iPhone Duo.

Apple software chief Craig Federighi detailed how developers can access hinge angle data and device 'pose' information for the iPhone Duo. This API allows for new application behaviors and continuity between the device's closed and open states.

Developer Vidit Bhargava created "Duo-Man," an app for the unreleased iPhone Duo that simulates a classic Walkman experience, winning second place at the Bitrig hackathon. The app uses the Duo's dual screens to mimic inserting a cassette and playing music, attracting significant online attention.

Hidden code reveals five new StandBy mode views for the upcoming iPhone Duo: Home Camera, Home Modular, Flow, Fade, and Snoopy. These features expand the device's utility beyond previously announced capabilities, offering more options for smart home integration and ambient displays.

Apple's recent announcement of the iPhone Duo, its first foldable smartphone, has generated discussion regarding its name, which is shared with Microsoft's Surface Duo. This naming choice has led to online comparisons, despite Apple's prior use of "Duo" for its 1992 PowerBook Duo and the 2020 MagSafe Duo Charger.

A video demonstrates the iPhone Duo being used left-handed, addressing concerns about its design which appears optimized for right-handed use. The demonstration suggests the device is usable for left-handed individuals, though personal testing is recommended due to variations in hand size.

Apple is requiring iOS developers to update their applications to support the upcoming foldable iPhone Duo, which features multiple display states, orientations, and new UI behaviors. Developers need to use Xcode 27.1 and adopt adaptive layouts to ensure apps function correctly across the device's outer, inner, and partially folded screens.

Apple's new iPhone Duo supports the USB-C Apple Pencil, a feature Samsung removed from its latest Galaxy Z Fold models. This move by Apple, despite its own production challenges, puts pressure on Samsung to reintroduce stylus support in future foldable phones.

Apple's new iPhone Duo, launching in October, features software specifically designed for its foldable form factor, including iPad-inspired multitasking and an optimized iOS interface. These changes allow for side-by-side app usage and new interaction modes not available on standard iPhones.

Apple's new iPhone Duo requires apps to be recompiled for iOS 27.0 or 27.1 to fully utilize its larger display and new UI components, potentially leading to many apps displaying with black bars. This approach, while enabling a custom interface, risks slow developer adoption and a suboptimal user experience, especially for mobile gaming.

Apple's VP of Hardware Engineering, Tom Marieb, discussed the iPhone Duo's durability, hinge design, and display crease in an interview. He highlighted the use of nano-texture to minimize the crease and the engineering efforts behind the hinge's torque profile. These details address key hardware concerns for the upcoming iPhone Duo.

Hands-on videos of the iPhone Duo have emerged, demonstrating its software keyboard, app multitasking, and camera capabilities ahead of its October release. These videos provide insight into the user experience on the new folding device, addressing questions about its unique form factor.

A comparison details the specifications of the iPhone Duo and Samsung Galaxy Z Fold 8, focusing on dimensions, durability, cameras, and battery. The analysis highlights key differences that could influence consumer choice between the two foldable smartphones.

Craig Federighi, Apple's SVP of Software Engineering, addressed the potential overlap between the new iPhone Duo and iPads, particularly the iPad mini. He stated that users will find natural patterns for device usage, similar to how they differentiate between iPads and Macs, and highlighted Apple's custom iOS adaptation for the iPhone Duo.

Apple's new iPhone Duo features an elegant split-screen multitasking system, which contrasts with the more convoluted windowing approach in iPadOS 26 and 27. The iPhone Duo's system allows for easier app selection and video split-screening, suggesting a potential improvement for iPad multitasking, especially on smaller models like the iPad mini.

Apple CEO John Ternus and SVP of Marketing Greg Joswiak commented on the iPhone Duo, addressing design choices and software optimization. They highlighted the device's nanotexture finish and developer relationships for app optimization, positioning it against Android foldable competitors.

An Android user highlighted two Apple announcements, Reference Image and AppleCare One Family, as features they found compelling despite their preference for Android. Reference Image offers a way to verify photo authenticity against AI modifications, while AppleCare One Family provides comprehensive device protection for up to six family members.

Apple CEO John Ternus and head of marketing Greg Joswiak addressed the similarity of competitor foldable phone designs to the iPhone Duo, noting that the aspect ratio of their device was leaked. They highlighted that the folding nano-texture display of the iPhone Duo remained a secret during its development. This indicates Apple's awareness of industry leaks and its efforts to protect specific technological advancements.

Apple's upcoming iPhone Duo will launch with three tiers of app compatibility, with older iOS apps displaying poorly and fully optimized apps taking advantage of the new display. Developers will need new tools and an iOS 27.1 beta to begin optimizing their applications for the device.

Apple has released the iPhone Duo, its first foldable smartphone, after nearly a decade of speculation. The device aims to combine a tablet-sized screen experience with smartphone portability, integrating features like Apple Pencil support and a redesigned interface for its 7.6-inch inner display.

Apple's new iPhone Duo enters a mature foldable market with hardware features largely seen before. Its software polish is highlighted as a potential differentiator, despite the hardware lacking significant innovation compared to existing Android foldables.

A user recreated the iPhone Duo's unique unfolding animation on a Samsung Galaxy Z Fold 8, sharing the result on Reddit. This development highlights user interest in advanced UI/UX features for foldable devices, potentially influencing future software updates from manufacturers like Samsung.

Apple introduced the iPhone Duo, a new book-style foldable phone, alongside other products. The device's hardware specifications are comparable to existing foldables, but its iOS software experience for foldables is highlighted as a key differentiator.

Apple's new iPhone Duo will display unoptimized apps with black bars on its foldable screen, a behavior Apple CEO John Ternus criticized in Android foldables. This approach is documented in iOS 27.1, indicating that apps not updated for the new form factor will not fully utilize the display.

Apple unveiled the iPhone Duo, its first foldable smartphone, which includes exclusive camera software, an under-display camera, and a nano-texture finish on the folding screen. The device will be eSIM-only globally, supports the USB-C Apple Pencil, and will ship with iOS 27.1 starting October 23.

Apple announced how third-party applications will function on its new iPhone Duo foldable device, outlining three compatibility modes based on iOS versions. This matters as it clarifies the user experience and developer requirements for apps on Apple's first foldable hardware.

Apple has redesigned iOS 27 for its new foldable iPhone Duo, adapting controls and app layouts for the device's multiple screens and flexible display. The iPhone Duo will also be the first iPhone to support Apple Pencil, with USB-C Pencil support expected later this year.

Apple introduced the iPhone Duo, its first foldable phone, which features an iPad-like interface to utilize its larger screen real estate. This device allows users to run multiple apps simultaneously and offers redesigned app layouts for improved single-handed use, marking a significant change for iPhone functionality.