Apple Says Over 100,000 Apps Now Optimized for iPhone Duo
Apple says more than 100,000 apps are now optimized for its foldable iPhone Duo, just two weeks after launch, with thousands more arriving daily.

Apple says the number of apps optimized for its foldable iPhone Duo has passed 100,000. The company adds that thousands of new compatible apps reach the App Store every day. The figure arrives only two weeks after the phone went on sale, and it points to fast software support for the device's large inner display.
Updated apps include Microsoft Word and Outlook, Zoom, the NBA and NHL apps, Etsy, LTK, Goodnotes, Extra and Halide Mark III. Netflix, YouTube, Instagram and WhatsApp were already adapted to the Duo's screen earlier. To help developers try the device and update their apps, Apple ran more than 50 in-person workshops in 19 cities worldwide, attended by over 2,000 developers.
Optimization is not a guarantee
The growing count does not mean every experience is smooth. Apps that have not been updated for the iPhone Duo can leave part of the screen unused when the device is unfolded, producing black bars along the edges. In some apps, stretching the existing interface to the wider display can misplace buttons and navigation elements. Instagram, despite carrying a "Made for iPhone Duo" label, had interface problems in the early period, which shows that optimization alone does not ensure a flawless result.
What Apple asks of developers
Apple is pointing developers to the iOS 27.1 software development kit. It lets apps use the entire inner display and adapt their interfaces as the phone is folded and unfolded. The company wants developers to build multi-column designs suited to the wide canvas instead of simply enlarging the current phone layout. Tools in Xcode also help developers find layout problems that appear across different screen sizes.
For buyers, the practical effect is that the most popular apps are likely to fill the inner screen properly, while lesser-used ones may still show black borders for now.
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