Apple’s new foldable phone, the iPhone Duo, introduces a freshly redesigned Dock — it’s vertical, placed on the right side of the screen, and currently capped at four apps. Users hoping to squeeze in a fifth or sixth icon will have to wait; attempts to add more have so far failed.
What’s Changed
Unlike previous iPhones with horizontal home screens, the Duo’s Dock shifts the action vertically along the side of the screen. While the design may take some getting used to — especially for left-handed folks — early hands-on usage shows the new layout in action. Notably, the system refuses to add a fifth app to the Dock, enforcing a maximum of four at this time.
No Documentation, No Workarounds
Apple’s official tech documentation doesn’t mention the four-app limit. So far, all evidence of it comes from real-world testing and demos, including by prominent tech creators who tried and failed to exceed the limit. There’s no indication yet of whether Apple will revise this behavior or introduce options like a side for left-handed users.
This vertical Dock marks a departure from tradition for iPhone design. It’s a visible outcome of Apple rethinking system UI for foldable displays and dual-screen layouts. The change raises questions of adaptability — how well app icons scale and how comfortably people adjust to these interface shifts.
What to watch: whether upcoming software updates (in iOS or firmware) lift the app restriction or bring customization, and if Apple adds a left-handed mode. Developers and power users in particular will be keeping tabs — the Dock is foundational to usability when switching between closed and open states.
