Apple’s first foldable iPhone goes on sale this Friday, October 23, and the first iPhone Duo apps are ready before the hardware reaches buyers. In an update published on October 22, Apple said developers have optimized their apps and games for iPhone Duo, rebuilding layouts around a folding screen and Split View multitasking on an iPhone for the first time.
The list runs long. Netflix, Prime Video, Microsoft Word, Zoom, Slack, Instagram and Asphalt Legends are among the names Apple highlighted. New App Store collections for iPhone Duo apps go live on Friday, and optimized apps carry a Made for iPhone Duo badge in the store.
The hardware gives developers room to work with. The inner display is 50 percent larger than the screen on iPhone 18 Pro Max, both displays share the same aspect ratio, and apps scale proportionally as they move between them. An A20 Pro chip powers the heavier designs.
Key Takeaways
- Optimized iPhone Duo apps from Netflix, Microsoft, Zoom and others are ready for Friday’s launch.
- Split View runs two apps side by side on an iPhone for the first time.
- Half folded poses split content across the fold, with video on top and details below.
- More than 2,000 developers attended Apple’s iPhone Duo workshops in 19 cities.
- iPhone Duo starts at $1,999 in the US and €2,299 in Germany, on sale October 23.
iPhone Duo Apps for Streaming and Sports Get the Big Screen
Netflix rebuilt discovery around the fold. Members scroll through short Clips on the outer display, then open the phone and keep watching on the larger nano-texture inner display. Clips rotate as the device opens, closes or turns. Tom Richards, Netflix’s senior director of Engineering, said the experience was built to move with viewers, from browsing on the small screen to settling in on the big one.
Prime Video uses the half folded pose as a feature. A film plays on the upper half of the display while X-Ray cast and bonus details fill the lower half. Paramount+ adds richer playback controls, and propped open on a table, the Duo plays video hands-free, no stand needed.
Sports apps do the same. In the MLB app, a live game plays on the upright half while real time stats fill the half resting on the table, a setup Apple says is ready for the World Series. Kenny Gersh, an MLB executive vice president, said fans never have to choose between the broadcast and the box score.
Split View Changes How Work Apps Behave
Split View is the deeper change. Two iPhone Duo apps can now sit side by side on an iPhone. Microsoft Word and Outlook arrive in the coming weeks with what Apple calls a desktop class layout: formatting tools beside the document in Word, the inbox beside a full message in Outlook. Zoom turns the inner display into a small conference room, with shared content and faces visible at once. Slack shows channels and threads together, Salesforce fits more of its dashboards on one screen, and Fantastical shows calendars, tasks and menus in a single view.
Creators and Games Use the Fold Differently
Creative apps treat the fold as an editing desk. Detail places a video beside its transcript, how podcast editors already work on larger screens. Its AI models run on the device through Apple’s Core AI framework, so captions, filler word removal and audio cleanup stay fast and private. Instagram shows more posts at once, Edits opens a full studio view, and VLLO fits more footage and controls on one screen.
Games lean on performance. Apple says the A20 Pro and a custom vapor chamber deliver up to 35 percent better sustained performance than iPhone 17 Pro, a company figure independent testing has not yet confirmed. Asphalt Legends fills the inner display with more than 350 cars and races against up to seven online opponents. Zenless Zone Zero adapts its controls to every pose, with its Duo update due next month, and UnGodly, a dark fantasy RPG from Azra Games, launches in November.
Kitchens, Trips and Daily Errands
Everyday iPhone Duo apps may matter most over time. NYT Cooking props the Duo on a counter, showing detailed recipes, timers and technique videos in one view. Yelp puts its map and reviews side by side. LTK pairs creator videos with the products on sale, and OpenTable keeps details and availability together. Lyft shows ride options beside the route map, Flighty adds a propped up tracking mode, and American and United rebuilt their trip screens for the wider layout. DoorDash plans a larger delivery map later this year.
Why It Matters
Foldable phones from rival makers have been on sale for years, and their weak point was rarely the hinge. It was software that stretched instead of adapting. Apple is trying to skip that phase, with a badge system, launch week collections and day one support from the services people open most. Susan Prescott, Apple’s vice president of Worldwide Developer Relations, said the developer response has been incredible. The scale backs her up: over 2,000 developers attended more than 50 workshops in 19 cities, with more sessions planned across Europe and North America.
The tooling explains how smaller teams shipped their iPhone Duo apps on time. Apps built with standard SwiftUI and UIKit components adapt to each display automatically. The iOS 27.1 SDK adds a hinge API that reacts to the fold angle, reserved region APIs that keep controls clear of the crease, and scene accessories that show content on both displays at once. New camera APIs support rear camera selfies and the first under display camera on an iPhone, and Xcode 27.1 Device Hub simulates every pose for testing.
The catch is the price of entry. iPhone Duo starts at $1,999 (US) and €2,299 (Germany), with France at €2,339, in four storage sizes from 256GB to 2TB and two finishes, star white and night sky. Pre-orders are open in more than 70 countries, with 28 more on October 30. CNET reported Apple is limiting how many units each customer can buy at launch, a sign early supply is tight.
iPhone Duo Apps: Quick Answers
When does iPhone Duo go on sale? Friday, October 23, in more than 70 countries. A second wave of 28 countries follows on October 30.
How much does it cost? From $1,999 in the US. In Europe, the 256GB model costs €2,299 in Germany and €2,339 in France.
How do I find apps made for the Duo? Look for the Made for iPhone Duo badge on App Store pages. New iPhone Duo app collections go live on Friday.
Do regular apps still work? Yes. Apple says apps built with standard SwiftUI and UIKit components adapt to both displays automatically, while optimized apps add split layouts.
Which big iPhone Duo apps are ready first? Netflix, Prime Video, Zoom, Slack, Instagram and Asphalt Legends lead the launch. Word and Outlook follow in the coming weeks, with more updates through the year.
What to Watch Next
The hardware gets the attention on Friday, but the software decides whether owners still use the big screen in December. If split layouts become the default for major apps, the Duo sets the pattern future foldables must match. If updates slow after launch week, the inner display risks becoming a novelty. Apple says more optimized iPhone Duo apps arrive through the year, and that pace is the number worth watching.
