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Claude on a Foldable Screen Treats “Unfolding” as Part of the Interaction

Alex Finn says it may be the best-designed AI app. Robert Bye breaks down the design process: two adaptive layouts, system components, user journeys, button reachability, and that overlooked bottom-right corner.

Alex Finn said in a tweet that Claude on the iPhone Duo may be the best-designed AI app. The iPhone Duo is the foldable phone in the tweet, and Claude is Anthropic's AI assistant.

That claim easily starts an argument. In the replies, someone asked, “Best design, or the first one to survive on a foldable screen?” Others said, “Isn't it just an iPad app?” Someone even posted a Flappy Bird GIF to push back.

Robert Bye then broke down the design process in great detail. After seeing those details, at least one thing becomes clear: the focus of foldable-screen adaptation is what to put in the extra half after unfolding—making the interface wider is only superficial.

Robert Bye gave a very practical constraint: the Duo can be closed, open, portrait, landscape, and split-screen with other apps. There are many layouts, and designing each one individually isn't realistic. In the end, they made only one narrow layout and one wide layout, letting the interface flex between the two.

Another labor-saving approach is using system components. System components move themselves into the right place when the phone opens, closes, or rotates, leaving developers time for what's unique to the app.

More important is the user journey. Claude opens an artifact on the closed screen; when unfolded, the artifact moves next to the chat so the user can keep editing. That motion conveys more than a simple transition animation.

Both side-by-side and full screen need to be available. There's a button on the artifact to switch to full screen, and the same button takes you back.

Robert Bye also mentioned details like button placement: when the Duo is unfolded, the bottom-right corner is actually hard to see. When it's closed, New chat sits at the bottom of the toolbar, close to the thumb.

Panel and sidebar states should be predictable. In Claude, side-by-side is always sidebar plus chat, or chat plus artifact, and the artifact has its own Close button.

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They also had a mental model: think of the app as a path of screens from general to specific. When closed, you see the last screen; when unfolded, you see the last two screens, in the same order.

A small detail: text and buttons avoid the toolbar, but the content background color can continue under the toolbar. The whole panel feels like one surface, which makes it more immersive.

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One counterintuitive point among these choices: static screenshots can be misleading. Robert Bye said the ordinary iPhone drawer looked better in a screenshot of the closed portrait Duo, but when actually looking at the unfolded phone, the full-screen sidebar was more consistent, so they chose the latter.

So Alex Finn's phrase “best design” deserves a question mark. Some replies also reminded people that what an app can do after you close it matters more than whether it looks good when open. Phil Askey also posted an image complaining that the right side wastes space and saying it works better on Android foldables.

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These objections don't diminish the reference value of Claude's adaptation this time. At the very least, it puts the design problem of foldable AI apps on the table: the extra space after unfolding shouldn't just be blank space, nor should it simply copy a tablet. It has to catch the user's next action.

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发布时间: 2026-10-25 19:39