Apple today announced the iPhone Duo, a new iPhone that features two screens and a foldable inner display.
iPhone Duo design and displays
Apple said the two halves of the iPhone Duo connect into a single continuous frame with the same aspect ratio across both displays, and that the transition between open and closed is designed to feel fluid. When fully open, Apple called it the thinnest iPhone ever, with an architecture that packages its components into the camera plateau.
The frame is machined and polished titanium, with Ceramic Shield on the back and Ceramic Shield 2 on the front, and the device carries an IP68 rating. iPhone Duo comes in two colors, Star White and Night Sky. Touch ID is built into the side button, and the device can also be unlocked using an Apple Watch.
A custom hinge made from more than 100 tiny precision components holds the display flat when open and controls the folding motion. Apple said the display structure uses a multi-layer lamination design with viscoelastic adhesives that let the display’s layers glide against each other during folding “like pages in a book,” preventing distortion over time. A titanium plate forms the bottom layer for added durability, with carbon fiber support plates creating a stiff, lightweight base for the display to rest on.
The inner display measures 7.6 inches — Apple said this is 50% larger than the iPhone 18 Pro Max and 80% larger than the iPhone 18 Pro — while the outer display is 5.4 inches and offers 90% of the screen area of the iPhone 18 Pro. Apple Pencil support is coming to both displays later this year.
For the display surface, Apple said it created a custom nano texture finish that cuts down on glare and reflections, and described a separate micro lens texture produced using maskless laser lithography that writes each lens pixel by pixel to create a “perceptually flat matte surface” that minimizes the visibility of the fold crease while still feeling premium to the touch.
Software and multitasking
iOS on the iPhone Duo moves essential controls to the sides of the display to sit within thumb reach, orients the Home Screen dock vertically, and redesigns the status bar to fit into the corner of the display. Software transitions gracefully between the outer and inner displays as the device opens, keeping controls in a consistent position while content scales up.
Apple said iOS adapts to how the device is angled or propped and can be used partially folded, with content sliding away from the crease where taps are harder to register. Custom audio tuning adjusts for the changing distance between the speakers depending on how the device is positioned. Users can run two apps at once or open the same app twice, swipe up from the bottom to switch apps or pair two apps together to reopen later. A new Standby mode adds widgets for music, calendar, or weather, and the device can double as a bedside clock with a soft glow.
Cameras and capture features
The iPhone Duo uses a 48MP Fusion main camera design alongside a 48MP Fusion ultra wide camera — the same ultra wide used in the iPhone 18 Pro — and supports Apple’s upgraded Photographic Styles. Because the device can stand on its own, Apple said it opens new options for capturing time lapses in 4K Dolby Vision HDR.
The outer display houses a 12MP Center Stage front camera that Apple said improves selfies by letting people preview the shot before taking it. The inner display contains its own FaceTime camera hidden behind the screen, which works whether the device is fully open or propped on a surface, and the two cameras can dual capture front and rear scenes simultaneously. A new Duo FaceTime feature lets someone else join a video call from the outer display. Apple also described a Smart Take feature that tracks a scene and automatically takes the photo once everyone in a group shot is ready, and said the outer display can play animations to help hold a child’s attention for the camera.
Performance, battery and accessories
The iPhone Duo features the new C2 modem, which Apple said is up to 50% faster than the C1X, adds 5G mmWave support in the U.S., and uses up to 15% less battery. Apple also said AI algorithms improve everyday cellular reliability, including reconnecting faster in areas with weak coverage, and that the device delivers up to 35% higher sustained performance than the iPhone 17 Pro. The iPhone Duo is eSIM only worldwide.
Each half of the device has its own battery that Apple said operate together as a single battery for all-day use. Apple rated the device for up to 31 hours of video playback on the inner display and 44 hours on the outer display; using both screens equally, it is rated for up to 24 hours of battery life. Fast charging reaches 50% in around 20 minutes, and Apple said five minutes of charging provides up to five hours of video playback on the outer display.
New accessories include a Duo Folio case with a built-in kickstand and an iPhone Duo case made of two separate parts that wrap around each half of the device.
The iPhone Duo starts at $1,999 for 256GB, with storage options up to 2TB. Preorders begin October 16, with availability starting October 23.
