Two weeks after the iPhone Duo went on sale, Apple says the foldable’s biggest early weakness is turning into a strength. More than 100,000 apps are now built for the Duo’s folding display, the company said on Friday, November 6, and thousands more are being optimised every day.
“Today there are well over 100,000 apps built for iPhone Duo already live on the App Store, and thousands of optimized apps are being added to the store each day,” Susan Prescott, Apple’s vice president of Worldwide Developer Relations, said in a statement shared with The Verge, MacRumors, TechCrunch, 9to5Mac and CNET.
The milestone lands exactly two weeks after the $1,999 foldable went on sale on October 23. At launch, the thin app catalogue was the most common complaint in reviews. A foldable lives or dies on whether apps use the bigger screen, and early buyers found plenty of their daily apps running in a cramped, letterboxed window instead.
What “optimised for Duo” actually means
The 100,000 figure is Apple’s own count, and it is worth knowing what it counts. MacRumors confirmed with Apple that the total covers apps built with the iOS 27.1 software development kit or later. Those apps fill the full width of both the Duo’s inner and outer displays, and they can move their controls into the status bar area. Optimised apps carry a “Made for iPhone Duo” badge in their App Store listing.
Apps built with the earlier iOS 27 SDK fill most of the inner screen but leave the status bar area alone. Anything built on the iOS 26 SDK or older runs centred, with black space on both sides. So the number is a real measure of developer adoption, but it is a measure of builds, not of how good each app feels on the big screen.
Put the number in context and it is still early days. One hundred thousand is roughly one in eighteen apps on the App Store. The catalogue is growing fast, but most of the store is not Duo-ready yet, and it will not be for a while.
The big names that just arrived
The recent wave includes the apps people actually open every day. Microsoft’s Word, Excel, PowerPoint, OneNote and Outlook are now optimised, along with Zoom, Etsy, Goodnotes and the Halide Mark III camera app. Google Maps is one of the latest arrivals: version 26.44.4 now fills both of the Duo’s screens, after the previous version left a black strip down the right side.
Netflix, Prime Video, WhatsApp, YouTube, Instagram, Spotify and ChatGPT were already optimised at launch, according to Apple’s lists. Add the new arrivals and the Duo now covers the core of most people’s home screens, which is a very different picture from launch week.
The gaps that still matter
The holdouts are not obscure apps. They are the ones many buyers use at work and for money. As of MacRumors’ November 6 check, Google Docs, Google Sheets and Google Slides were still not optimised, and neither were Google Home or YouTube Music. Microsoft Teams, PayPal, Venmo, DoorDash, Uber Eats, Duolingo and Starbucks are on the same list, along with Bluesky, Delta, Best Buy and Apple’s own Apple Store app.
That last one stings a little. Apple’s own store app is not yet built for Apple’s own foldable. It is a small thing, but it shows the transition is unfinished even inside Cupertino.
Apple has set a deadline that should force the stragglers. Starting in April 2027, new app and game submissions will need to include iPhone Duo screenshots, which in practice means building against the newer SDK. Developers with existing apps face no hard cutoff yet, but the direction is clear.
What this means if you are thinking of buying one
The app situation is now fixed faster than the supply situation. Our check last week found the Duo wait still at 89 days, with new orders shipping in January 2027, though the 256GB model has started showing up in stores for pickup. If you can get one, the software side is in much better shape than it was on October 23.
Still, check your own most-used apps before you buy. If your day runs on Google Docs and Microsoft Teams, you will be staring at black bars for now. If it runs on Word, Outlook, Zoom and Netflix, the Duo is ready for you.
The fold itself, at least, is holding up. CNET’s livestreamed fold test passed 260,000 folds last week with the machine still going. The hardware was never the question. The apps were, and 100,000 of them have now answered.
For buyers weighing the Duo against a conventional flagship, our iPhone 17 Pro versus iPhone 18 Pro comparison breaks down what the $100 difference actually buys, including the camera and chip changes that also sit inside the Duo.
