iPhone Duo Dock Leaves 15 Percent of Cover Screen Unused

Apple’s entry into the wide foldable market is drawing scrutiny over software choices that limit the device’s most distinctive feature. The iPhone Duo, now in limited release, ships with a fixed sidebar on its 5.4-inch cover screen that occupies a substantial portion of the available real estate. This design choice contrasts sharply with the flexible interface of its main competitor, the Samsung Galaxy Z Fold 8.

The Verge’s Allison Johnson noted in a recent review that the iPhone Duo feels harder to operate with one hand than the Fold 8. She attributed this difficulty partly to the physical dimensions, but also to the way the operating system manages the small outer display. The iPhone Duo’s dock is anchored to the right side, creating a large area of the screen that remains inactive during standard use. This reserved space reduces the area available for app content or media consumption.

A post on X highlighted the visual disparity between the two devices. When the Galaxy Z Fold 8 is configured to use navigation gestures, the interface utilizes nearly the entire width of the cover screen. In a comparison video, the Fold 8 was set to use a navigation bar instead of gestures to provide a closer parallel, yet even then, the difference in wasted space was noticeable. The iPhone Duo’s approach shrinks the usable area to stretch media content vertically, mimicking the aspect ratio of a traditional slab phone. However, the Fold 8 demonstrates that leaving the full width open for main content can be more effective for users.

The criticism extends beyond the sidebar to the general state of iOS on this new form factor. While Samsung and Google have spent years refining Android for large and foldable screens, Apple is making its first attempt with this device. Early user feedback suggests that the hardware is promising, but the software implementation lags behind the polish seen in the mature Galaxy Z line. The iPhone Duo aims to offer a space-saving solution for the small display, but the execution leaves less room for user interaction than expected.

The iPhone Duo is currently available in limited regions, while the Galaxy Z Fold 8 continues to serve as the benchmark for the category. The debate over the sidebar is part of a larger conversation about how best to utilize the secondary screens on foldable phones. For users who prioritize maximizing the cover display, the iPhone Duo’s fixed elements present a tangible trade-off in usability.

The device’s launch marks Apple’s first foray into this specific hardware niche, and the initial reception has focused heavily on these interface details. The comparison to the Fold 8 is unavoidable given the similar form factors, and the differences in screen utilization are immediately visible to users who switch between the two. The fixed sidebar remains a defining characteristic of the iPhone Duo’s cover screen experience.