iOS 27 code "reveals secrets": Apple's first foldable iPhone is about to debut

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The outline of Apple's upcoming foldable screen iPhone is becoming increasingly clear through its latest software version. Hidden code strings in the iOS 27 developer beta, along with the design direction of multiple new features, together form the most direct public signal so far, indicating that this device, which will disrupt nearly 20 years of the iPhone form, has entered the sprint phase.

According to Bloomberg, software researcher M1Astra discovered code related to foldable hardware in the first developer beta of iOS 27. This batch of code and feature updates not only reveals Apple's hardware development progress but also lays the groundwork for developers to adapt to the foldable screen ecosystem. For investors continuously focused on Apple's next growth engine, this series of software clues provides an important reference for the product's launch timeline.

According to previous information, Apple's foldable screen iPhone is planned to debut alongside the iPhone 18 Pro series this September, with a starting price of about $2,000, directly facing challenges from competitor devices like the Samsung Galaxy Z Fold series.

Code Points Directly to Foldable Hardware; Hinge Angle Can Be Detected

M1Astra found that internal iOS 27 code contains multiple strings directly related to determining the foldable state. One mechanism is internally named "foldState", used to identify whether the device is folded or unfolded; there are also "mechanicalAngleDegrees" and "angleDegrees" entries, which show that the operating system can detect the precise angle at which the device is unfolded around the hinge.

In addition, iOS 27 also embeds identifiers related to the updated version of Apple's internal repair tool, which adds references to a secondary display, a second cover glass, and two additional light sensors — highly consistent with the dual-screen hardware architecture of a foldable screen device.

iOS 27's new user-facing features likewise reveal intentions behind the foldable screen design. The system adds a full-page widget format, allowing music, news, weather, and other apps to occupy the entire main screen. This design will be especially practical on a foldable iPhone with a larger internal screen, making full use of left-right column display advantages.

macOS 27 Golden Gate has updated the iPhone mirroring feature, enabling the connected iPhone to be adjusted to an iPad-sized layout. Bloomberg previously reported that support for iPad-like display proportions will be a core part of the foldable iPhone experience.

Apple Calls Developers to Prepare for Dynamic Screen Sizes

In a previous developer "Platform Technology Status" presentation, Apple focused on the concept of "app adaptability", clearly guiding developers to move away from designing for specific devices and screen orientations.

Apple stated in the presentation: "Now, your design target is no longer a specific device and screen orientation, but a range of dynamically changing sizes and aspect ratios." This directly corresponds to foldable screens needing to display radically different interfaces in both folded and unfolded states.

Apple has always pre-built software support in new systems for upcoming hardware products. Bloomberg pointed out that similar clues in iOS 27 also point to camera-equipped wearable devices, including AirPods and smart glasses. The new Vision Pro operating system adds abilities to recognize and analyze real-world objects around users, in line with Apple’s direction in wearable product strategy.

For investors, intensive preparations at the software layer confirm the development progress of the foldable iPhone and remain consistent with Bloomberg's previously disclosed September release timeline.

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