Apple today announced the "iPhone Duo," a new kind of iPhone featuring two screens and a foldable inner display.
The two halves of the iPhone Duo connect into a single continuous frame with the same aspect ratio across both displays, and Apple said the transition between open and closed is designed to feel fluid. When fully open, Apple says it is the thinnest iPhone ever made, 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 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, which Apple said 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 itself, Apple said it created a custom nano texture finish that cuts down on glare and reflections. The company also described a separate micro lens texture, produced using maskless laser lithography that writes each lens pixel by pixel, which it said creates a "perceptually flat matte surface" that minimizes the visibility of the fold crease while still feeling premium to the touch.
The iPhone Duo also features a number of special software features. Essential controls have moved to the sides of the display to sit within thumb's reach, the Home Screen dock is now oriented vertically, and the status bar has been redesigned to fit into the corner of the display. Software transitions gracefully between the outer and inner displays as the device opens, with controls staying in a consistent position while content scales up.
iOS also adapts to how the device is angled or propped, and it 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, and can 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 Apple said the device can double as a bedside clock with a soft glow.
The iPhone Duo uses the same 48MP Fusion main camera design Apple has used elsewhere in its lineup alongside a 48MP Fusion ultra wide camera, the same ultra wide used in the iPhone 18 Pro, and supports Apple's upgraded Photographic Styles. Since the device can stand on its own, Apple said it opens up new options for capturing time lapses in 4K Dolby Vision HDR.
The outer display houses a 12MP Center Stage front camera, which Apple said improves selfies by letting people preview the shot before taking it. The inner display has 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. A Smart Take feature tracks a scene and automatically takes the photo once everyone in a group shot is ready, removing the need to set a timer, and the outer display can play animations to help hold a child's attention for the camera.
The iPhone Duo contains Apple's A20 Pro chip, just like the iPhone 18 Pro. It also 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, which Apple said operate together as a single battery for all day use, rated at up to 31 hours of video playback on the inner display and 44 hours on the outer display. Using both screens equally, Apple rates the device for up to 24 hours of battery life, with fast charging reaching 50% in around 20 minutes and just five minutes of charging providing up to five hours of video playback on the outer display.
New accessories include a Duo Folio case with a built in kickstand, along with 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 going up to 2TB. Preorders begin October 16, with availability starting October 23.
