iPhone Duo users face navigation issues

Users of the iPhone Duo, released in France on October 23, 2026, are reporting a software issue that affects navigation on the device's 5.4-inch external screen. The problem is particularly noticeable in Safari, where browser tools appear on the right side of the screen, making websites seem too narrow and causing elements like cookie or registration windows to take up nearly the entire space.

Apple acknowledges the problem

Apple has acknowledged the issue and is working on a fix. Jen Simmons, an engineer working on WebKit—the engine that powers Safari—explained that Apple aims to let developers use the screen space more creatively. A solution exists that would allow pages to extend behind the browser tools, but Apple has not activated it universally due to concerns that some websites may not leave enough margins, risking content overlap with the browser interface.

New badge helps identify compatible apps

Apple plans to inform developers about the issue and has introduced a "Made for iPhone Duo" badge in the App Store to help users identify applications that are adapted for the device. Currently, only 50 applications have this badge, including popular apps like Netflix, Zoom, Slack, and Outlook. Additional applications are in the process of adapting to the iPhone Duo.

Future requirements for app developers

Apple also plans to require screenshots adapted for the iPhone Duo for new applications submitted to the App Store starting in April 2027. This gives developers several months to adjust their interfaces. However, initial tests have shown that some applications are not yet well adapted to the two-screen setup, with some displaying large black bars on the 7.6-inch internal screen or leaving unused space on the side.

Software fix planned for future updates

The issue is described as a software problem rather than a hardware flaw. Apple intends to address it through future software updates, ensuring that the iPhone Duo’s dual-screen experience becomes more seamless for users over time.