Apple
Apple’s Design for iPhone Duo talk uses Mail as the reference layout: controls move to the side, and the inner display shows inbox beside the selected message.
How it supports DuoDuoReady Apps · 12 confirmed
Apps Ready for iPhone Duo
Discover apps optimized for iPhone Duo, including adaptive layouts, fold-aware interfaces, multiple displays, and Duo-specific experiences. Each entry cites how the app adapts — not just that it launches on the device.
Showing 4 apps with Split View
Mail
Photos
Apple
Apple’s product page shows Photos in Split View with Mail: browse the library on one side and drag a picture into a message on the other.
How it supports Duo
Safari
Apple
Apple says Duo can open two windows of the same app, and names Safari as the comparison-shopping example.
How it supports Duo
Notes
Apple
The Design for iPhone Duo talk shows Notes in Split View, with navigation and toolbar controls following whichever outer edge the app sits on.
How it supports Duo
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Is your app DuoReady?
We only list apps with public evidence — a developer write-up, an Apple showcase, or App Store notes that describe the Duo adaptation. Compatible scaling is not enough.
Submit your iPhone Duo app