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iPhone Duo goes on sale Oct 23, 2026. Developers are likely to update their apps then, so statuses are for reference until launch.

Release day, your time1 day 05:49:00

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United Airlines

United AirlinesTravel

View in the App Store
On iPhone Duo

Should fit

United Airlines is built with the iOS 27.1 SDK and should fill the inner screen completely.

Its latest version is built with the iOS 27.1 SDK.[1] The iOS 27 SDK fills most of the inner display, and the iOS 27.1 SDK fills all of it.[2]

How we know
From the app’s build
Checked on
Version 4.2.100
Build
iOS 27.1 SDK
has its own code for the fold
Latest version
4.2.100
Status updated

What owners report

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Sources

  1. App Store build, version 4.2.100

    Built with the iOS 27.1 SDK. Uses none of Apple’s iPhone Duo APIs; its own code includes UIDevice.isIPhoneDuo and isIPhoneDuoFolded(in:).

  2. Apple Developer: Prepare your app for iPhone Duo
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