Apple has updated its Apple Support app for the iPhone Duo, so it now fills the phone's wider screen instead of sitting in a letterbox.
The update adds support for the Duo and for iOS 27.1, the software version the phone ships with. Apple Support now displays properly on the wider display and can run alongside other apps in Split View, which puts two apps on screen at once. Apps that have not been updated are letterboxed: they appear at their old proportions, with thick black bars on each side.
The timing is not subtle. iPhone Duo reviews went live the same day as the update, and poorly sized apps are a recurring complaint among reviewers. A support app is a minor piece of software, but updating it shows Apple working through its own catalog first. Apple is expected to keep adapting its apps for the device.
The larger job belongs to third-party developers, and plenty of their updates are expected over the coming weeks. Early hiccups usually follow a major change in screen size, and app compatibility on the Duo should be largely sorted within a few months. That is a forecast, not a commitment from anyone.
For buyers, Apple's own apps are the easy part. The apps people open dozens of times a day, such as messaging, banking and social, will decide how the Duo feels. Which of those update first will show whether the black bars are launch-window noise or a lingering complaint.