iPhone Duo: Price, Release Date, Specs & Everything About Apple’s First Foldable iPhone
iPhone Duo foldable concept with large inner display and premium Apple-style design
The iPhone Duo is official.
After years of rumors about an “iPhone Fold” and “iPhone Ultra,” Apple unveiled the iPhone Duo on September 9, 2026, confirming that Duo is the name of its first foldable iPhone.
The new device opens like a book to reveal a 7.6-inch foldable display, while a smaller 5.4-inch outer screen works like a conventional iPhone when the device is closed.
The iPhone Duo starts at $1,999 in the United States, with pre-orders opening October 16 and retail availability beginning October 23.
It also introduces several features never before available together on an iPhone, including split-screen multitasking, Apple Pencil support, a foldable nano-texture display and Touch ID built into the side button.
Here is everything you need to know about Apple’s first foldable iPhone.
iPhone Duo at a Glance
| Feature | iPhone Duo |
|---|---|
| Announcement | September 9, 2026 |
| Pre-orders | October 16, 2026 |
| Release date | October 23, 2026 |
| Starting price | $1,999 |
| Inner display | 7.6-inch OLED |
| Outer display | 5.4-inch OLED |
| Refresh rate | Up to 120Hz ProMotion |
| Processor | A20 Pro |
| Rear cameras | Dual 48MP |
| Authentication | Touch ID |
| Apple Pencil | Supported |
| Storage | 256GB, 512GB, 1TB, 2TB |
| Colors | Star White, Night Sky |
| Water resistance | IP68 |
| Operating system | iOS 27 |
| Weight | 254 grams |
Apple describes Duo as its largest-display iPhone yet and says the device is the thinnest iPhone when opened.
When Is the iPhone Duo Release Date?
Apple has officially confirmed the iPhone Duo release schedule.
Pre-orders begin: Friday, October 16, 2026
General availability: Friday, October 23, 2026
Apple says the device will initially launch in the United States and more than 70 countries and regions.
That puts the Duo roughly a month behind Apple’s new iPhone 18 Pro lineup.
How Much Does the iPhone Duo Cost?
The iPhone Duo starts at $1,999 for the 256GB model in the United States.
Apple’s current U.S. pricing is:
| Storage | U.S. Price |
|---|---|
| 256GB | $1,999 |
| 512GB | $2,199 |
| 1TB | $2,599 |
| 2TB | $3,199 |
Apple’s online store lists all four configurations, making the 2TB model one of the most expensive iPhones the company has ever offered.
For comparison, the iPhone 18 Pro starts at $1,199 and the Pro Max at $1,299, according to Reuters.
That means the Duo is clearly positioned as an ultra-premium product rather than a replacement for Apple’s normal iPhone lineup.
What Does the iPhone Duo Look Like?
The iPhone Duo uses a book-style folding design.
When closed, the phone resembles a compact conventional smartphone with its 5.4-inch outer display.
Open the hinge and the device expands horizontally into a 7.6-inch tablet-like display.
Apple says the folded device is roughly similar in footprint to a passport.
The phone uses a polished grade 5 titanium enclosure and a precision hinge made from more than 100 components. Ceramic Shield protects the back, while Ceramic Shield 2 covers the outer display.
The two available finishes are:
Star White
Night Sky
How Big Is the iPhone Duo Display?
The iPhone Duo has two displays.
Inner Display
The main foldable screen measures 7.6 inches diagonally.
Apple’s specification sheet lists:
1878 × 2670 resolution
430 pixels per inch
OLED
ProMotion up to 120Hz
Always-On display
Up to 3,000 nits outdoor peak brightness
Nano-texture finish
Outer Display
The cover screen measures 5.4 inches.
It has a resolution of:
1398 × 2034 pixels at 460 ppi.
Apple says the outer display provides about 90% of the screen area of the iPhone 18 Pro, while the opened inner display is roughly 50% larger than the iPhone 18 Pro Max display.
Does the iPhone Duo Have a Screen Crease?
Apple has specifically tried to minimize one of the biggest complaints about foldable phones: the visible crease.
The inner screen uses a nano-texture cover layer designed to reduce reflections and make the folding crease less noticeable.
The Verge’s hands-on report said the crease was difficult to detect by touch during its early testing of the device.
That does not mean the crease is completely nonexistent, but Apple’s implementation appears designed to make it far less obvious during normal use.
How Thin Is the iPhone Duo?
Opened, the Duo measures approximately:
5.2 mm thick
Closed, it measures:
11.3 mm thick
The device weighs 254 grams, or approximately 8.96 ounces.
Apple describes it as the thinnest iPhone ever when fully opened.
What Chip Does the iPhone Duo Use?
The iPhone Duo is powered by Apple’s new A20 Pro chip.
The processor includes:
- 6-core CPU
- 7-core GPU
- Dual 16-core Neural Engine
- hardware-accelerated ray tracing.
Apple says A20 Pro is manufactured using a 2-nanometer process and delivers up to 20% faster CPU performance and up to 40% faster GPU performance compared with A19 Pro.
The phone also uses a custom vapor-chamber cooling system to sustain performance during gaming, AI workloads and multitasking.
Does iPhone Duo Support Multitasking?
Yes—and this is one of the most important differences between Duo and a normal iPhone.
Apple’s iOS 27 has been redesigned to take advantage of the larger foldable display.
When opened, Duo supports Split View, allowing two apps to run side by side. Users can also open two windows of the same app and save app pairs for quick access later.
Apple says apps such as:
- Netflix
- Zoom
- Slack
have already been optimized to take advantage of the larger display and folding design.
This makes the Duo closer to an iPad-style productivity device than any previous iPhone.
Does the iPhone Duo Support Apple Pencil?
Yes.
Apple says Apple Pencil (USB-C) support will arrive later in 2026.
The Pencil can be used for:
- handwritten notes,
- sketching,
- document markup,
- and other precision input.
Both the inner and outer displays support Apple Pencil input.
This is the first time Apple has officially added Pencil support to an iPhone.
Does iPhone Duo Have Face ID?
No.
Apple replaced Face ID with Touch ID built into the side button.
Apple says the placement makes authentication convenient whether the phone is open or closed.
The fingerprint sensor is also used for Apple Pay and other secure authentication.
The return of Touch ID is one of the most notable design changes in Apple’s modern iPhone lineup.
iPhone Duo Cameras
The iPhone Duo uses a dual 48MP rear-camera system.
Main Camera
The primary camera is a:
48MP Fusion Main camera
with:
- 26mm equivalent lens
- f/1.6 aperture
- sensor-shift optical image stabilization
- 24MP and 48MP photo modes
- optical-quality 2x zoom.
Ultra Wide Camera
The second rear camera is:
48MP Fusion Ultra Wide
with:
- 13mm equivalent lens
- f/2.2 aperture
- 120-degree field of view
- macro photography support.
The camera system offers up to 10x digital zoom.
Unlike the iPhone 18 Pro, however, Duo does not include the Pro model’s variable-aperture main-camera system.
Foldable Camera Features
Apple has created several camera modes specifically around the dual-screen design.
Duo Preview
People being photographed can see themselves on the outer display while someone uses the rear cameras.
Rear-Camera Selfies
Users can use the higher-resolution 48MP rear cameras for selfies while framing themselves on the cover screen.
Duo FaceTime
Someone beside the user can view a FaceTime call through the outer display while the phone is unfolded.
Apple also includes Smart Take and other AI-assisted photography features that make use of both screens.
How Good Is the iPhone Duo Battery?
Apple rates the Duo for:
Up to 24 hours of typical use
For video playback, Apple claims:
Up to 44 hours using the outer display
Up to 31 hours using the inner display.
The phone uses two internal lithium-ion batteries, one in each half of the device.
iPhone Duo Charging Speed
The Duo supports fast charging.
Apple says the phone can reach approximately:
50% charge in around 20 minutes
when connected to a 60W-or-higher compatible wired charger.
MagSafe and Qi2 wireless charging are supported at up to 25W.
Is the iPhone Duo Waterproof?
Apple gives the iPhone Duo an IP68 rating.
That means Apple’s laboratory testing covers water resistance at depths of up to 6 meters for as long as 30 minutes under IEC 60529 conditions.
Water resistance can decrease with normal wear, so the rating should not be interpreted as making the phone permanently waterproof.
Does iPhone Duo Have a Physical SIM Slot?
No.
The iPhone Duo is eSIM-only worldwide.
Apple lists support for dual active eSIMs and storage for eight or more eSIM profiles.
That makes Duo different from some existing iPhones sold in international markets that still support physical SIM cards.
iPhone Duo Colors
Apple offers two launch colors:
Star White
A bright silver-white titanium finish.
Night Sky
A darker, understated finish.
Apple has not announced additional Duo colors for launch.
iPhone Duo vs iPhone 18 Pro Max
The biggest question for premium iPhone buyers may be whether the foldable Duo is worth its considerable price premium.
| Feature | iPhone Duo | iPhone 18 Pro Max |
|---|---|---|
| Starting price | $1,999 | $1,299 |
| Design | Foldable | Traditional |
| Main screen | 7.6 inches | Smaller |
| Outer screen | 5.4 inches | — |
| Processor | A20 Pro | A20 Pro |
| Multitasking | Two apps side by side | Conventional iOS |
| Apple Pencil | Yes | No |
| Authentication | Touch ID | Face ID |
| Main camera | 48MP | 48MP variable aperture |
| Foldable | Yes | No |
The Duo’s main advantages are screen size, folding versatility and multitasking.
The Pro Max is significantly less expensive and offers Apple’s more photography-focused Pro camera system.
Is iPhone Duo the Phone Previously Called iPhone Ultra?
Yes, effectively.
Before Apple’s official announcement, media reports and rumor coverage frequently referred to the upcoming foldable as the iPhone Ultra, iPhone Fold or simply the foldable iPhone.
Apple ultimately chose the official name:
iPhone Duo.
If you previously published an article about the rumored iPhone Ultra, it is worth updating that page to explain that the device has officially become the iPhone Duo rather than treating them as two separate products.
Is the iPhone Duo Worth $1,999?
That depends heavily on what you want from a phone.
The Duo makes the strongest case for people who:
- want the largest iPhone screen available,
- regularly multitask,
- watch a lot of video,
- work with documents on mobile,
- want Apple Pencil compatibility,
- or simply want Apple’s first foldable device.
The value proposition is more difficult for someone who primarily uses an iPhone for messaging, social media, photography and ordinary apps.
At $1,999 for 256GB, Duo costs $700 more than the $1,299 starting price of the iPhone 18 Pro Max.
The 2TB Duo reaches $3,199, making storage upgrades particularly expensive.
Frequently Asked Questions
What is the iPhone Duo?
The iPhone Duo is Apple’s first foldable iPhone, officially announced on September 9, 2026. It folds open from a 5.4-inch phone into a 7.6-inch larger-screen device.
How much does iPhone Duo cost?
The iPhone Duo starts at $1,999 for 256GB in the United States. The 2TB model costs $3,199.
When does iPhone Duo come out?
Pre-orders begin October 16, 2026, and the iPhone Duo goes on sale October 23, 2026.
How big is the iPhone Duo screen?
The iPhone Duo has a 7.6-inch inner foldable display and a 5.4-inch outer display.
Does iPhone Duo have Face ID?
No. Apple uses Touch ID integrated into the side button on the iPhone Duo.
Does iPhone Duo support Apple Pencil?
Yes. Apple says support for the USB-C Apple Pencil will arrive later in 2026.
What processor does iPhone Duo use?
The phone uses Apple’s A20 Pro chip, the same chip family used in the iPhone 18 Pro models.
Is iPhone Duo waterproof?
The iPhone Duo carries an IP68 water- and dust-resistance rating.
What colors does iPhone Duo come in?
Apple offers two colors: Star White and Night Sky.
Was iPhone Duo previously called iPhone Ultra?
“iPhone Ultra” was an unofficial name widely used in rumors. Apple officially announced the foldable device as iPhone Duo on September 9, 2026.
Bottom Line
The iPhone Duo is Apple’s biggest physical redesign of the iPhone in years.
It combines a compact 5.4-inch cover display with a 7.6-inch folding OLED screen, while introducing split-screen multitasking, Apple Pencil support, Touch ID, dual 48MP cameras and the A20 Pro processor.
Apple has also addressed several traditional foldable-phone weaknesses with a titanium body, IP68 protection, a reinforced hinge and a nano-textured inner screen designed to minimize the visible crease.
The biggest obstacle is price.
The iPhone Duo starts at $1,999, rises to $3,199 with 2TB of storage, and will not reach customers until October 23.
For buyers who have waited years for a real foldable iPhone, however, the wait is finally over: iPhone Duo is no longer a rumor.
