Apple is exploring software fixes for the cramped web layout on the 5.4-inch outer display of its foldable iPhone Duo. Reviewers and developers point out that right-aligned Safari controls crowd web pages, leaving desktop-style navigation awkward and limited on the device’s exterior screen.
Safari Layout Constraints Limit iPhone Duo’s Outer Display
When folded, the external screen of the iPhone Duo forces Safari’s browser controls to sit on the right side of the panel. Apple moved these elements there to preserve vertical space on a display that is wider and shorter than standard iPhone screens. This design choice reduces horizontal width significantly.
I forgot to mention:We've updated @macstoriesnet for the iPhone Duo!This was a bit of work, but super happy to have day one support for our readers. pic.twitter.com/0ISZB72VWc
Web pages on the outer screen measure about 382 CSS pixels wide in portrait mode, according to Digital Trends. The browser tinted the leftover side strip to match the webpage’s background color. Content remains confined to a narrow column.
Early reviews highlighted how this arrangement impacts daily browsing.
Apple's Three Biggest Headaches:Apple Vision ProApple IntelligenceiPhone Duo
Apple is actively working to resolve these software and layout obstacles well before the device reaches consumers. This design challenge requires an adaptive UI solution that transitions smoothly between folded and unfolded modes without sacrificing usability. Instead of merely shrinking existing elements, Apple seeks a more foolproof approach.
Viewport-Fit Cover Fails for iPhone Duo Developers
Many websites fail to leave safe margins on every edge of their layouts. If developers flip that switch today, important headlines and interactive buttons risk vanishing completely underneath Safari’s side-mounted controls.

We would like to give web designers and developers the ability to design and use that space in more creative ways. For example, extending your header background across the full width of the display.
Rather than pushing a blanket setting that breaks existing site designs, Apple wants a more foolproof solution.
Safari’s Features Work, Unresolved Challenges Remain
While outer-display browsing remains a work in progress, Safari 27.1 brings notable updates elsewhere in the browser. Opening a PDF in Safari and folding the device partway like a paperback now automatically displays two pages side by side. It switches back to a single page when the phone lies flat or closes.
Developers can also test experimental features behind Safari feature flags to detect folding postures and adapt content around the middle crease. How Apple will adapt iOS for the foldable iPhone is still unknown.
Apple Wants to Fix Safari's Cramped Layout on iPhone Duo https://t.co/oFbNWQQcZ3 pic.twitter.com/OPDlDpRmZz
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