The list of apps optimized for iPhone Duo grew this week. According to MacRumors, Zoom was updated with iPhone Duo optimization over the weekend, and on Monday, November 2, Microsoft followed with Duo updates for Word, PowerPoint, Excel and OneNote. On the App Store, these show up as Made for iPhone Duo apps. That matters because apps were the Duo's weak spot at launch: in our coverage of Marques Brownlee's review, he called the apps situation the Duo's biggest downside, with most of the apps he used not yet optimized. The gap is starting to close, though one notable Microsoft app, Teams, is still waiting, as of November 2.
Key takeaways
- Zoom was updated with iPhone Duo optimization over the weekend, MacRumors reports. On the inner display, you can now see shared content and other participants at the same time.
- Microsoft updated Word, PowerPoint, Excel and OneNote for the Duo on November 2. Outlook was optimized from launch. Teams has not been optimized yet.
- Apps built with the iOS 27.1 SDK or later fill both displays; apps built with the iOS 26 SDK or earlier run centered on the inner display with empty space around them.
- Optimized apps carry a "Made for iPhone Duo" label in the App Store on the device.
Which apps are newly optimized for the iPhone Duo?
Zoom. MacRumors reports that Zoom was updated with iPhone Duo optimization over the weekend before November 2. On the Duo's large inner display, you can now see shared content, such as the host's desktop, and the other participants on a call at the same time. If you take Zoom calls in a dim room, our Edge Light how-to covers the Duo's built-in screen lighting for video calls, which works in Zoom.
Microsoft Word, PowerPoint, Excel and OneNote. Microsoft updated all four with iPhone Duo optimization on November 2, according to MacRumors. Microsoft Outlook had already been optimized since the Duo launched.
Still waiting: Microsoft Teams. As of November 2, MacRumors reports, Teams has yet to be optimized for the Duo.
These updates land against a launch where the app gap was the main complaint in our MKBHD review coverage: Brownlee found most of the apps he used were not yet optimized, and expected the situation to improve over time.
What does "optimized for iPhone Duo" actually mean?
MacRumors lays out the difference, and it comes down to which software kit an app was built with:
- Built with the iOS 27.1 SDK or later: fully optimized. These apps extend to fill the entire outer and inner displays, with toolbars and tab bars appearing vertically below the status bar.
- Built with the iOS 26 SDK or earlier: runs, but not optimized. These apps work on the Duo, but on the inner display they appear in the center, leaving lots of empty space around them.
To tell which is which before you download, look at the App Store on the Duo itself: per MacRumors, optimized apps carry a "Made for iPhone Duo" label there. For what else changed in the Duo's software, see our iOS 27 guide.
What is still missing?
Keeping strictly to what has been reported as of November 2:
- Microsoft Teams has not been optimized yet, MacRumors says, so for now it falls in the unoptimized group.
- Any app built with the iOS 26 SDK or earlier will keep running centered on the inner display until its developer ships an update built with the iOS 27.1 SDK or later.
Unoptimized apps still move between screens as you fold and unfold: in 9to5Mac's everyday tasks test, continuity between the two displays worked well even for apps not yet optimized.
Frequently asked questions
Which apps are optimized for the iPhone Duo?
As of November 2, 2026, MacRumors reports that Zoom and four Microsoft apps, Word, PowerPoint, Excel and OneNote, have been updated with iPhone Duo optimization, and that Microsoft Outlook was optimized from launch. More apps are optimized when developers rebuild them with the iOS 27.1 SDK or later. On the Duo, the App Store marks optimized apps with a "Made for iPhone Duo" label.
What does Made for iPhone Duo mean in the App Store?
It is the label the App Store on the iPhone Duo shows for apps optimized for the device, according to MacRumors. Optimized apps are built with the iOS 27.1 SDK or later and fill the entire outer and inner displays, with toolbars and tab bars appearing vertically below the status bar.
Does Microsoft Teams work on the iPhone Duo?
Microsoft Teams has not been optimized for the iPhone Duo yet, MacRumors reported on November 2, 2026. According to MacRumors, apps that are not optimized still run on the Duo, but appear in the center of the inner display with empty space around them.
Why do some apps not fill the iPhone Duo screen?
Because they have not been updated for it yet. MacRumors explains that apps built with the iOS 26 SDK or earlier run on the iPhone Duo but appear in the center of the inner display, leaving lots of empty space. Apps built with the iOS 27.1 SDK or later fill both displays.
Sources
- MacRumors, "Zoom and These Microsoft Apps Now Optimized for iPhone Duo," Joe Rossignol, November 2, 2026: Zoom's weekend update and inner display layout, Word, PowerPoint, Excel and OneNote updates, Outlook optimized at launch, Teams not yet optimized, SDK rules, centered layout for older apps, "Made for iPhone Duo" App Store label.
- Image: Apple.