iPhone Duo · October 2026
iPhone Duo vs every iPhone, folded and unfolded
Folded, iPhone Duo is 117.8 × 84.1 × 11.3 mm: shorter than any iPhone on sale but wider, thicker and, at 254 g, heavier than all of them. Unfolded it is 164.6 mm wide and 5.2 mm thin, with a 7.6-inch screen that has 50% more area than iPhone 18 Pro Max's.
Folded iPhone Duo (in colour) next to every iPhone Apple sells today, at one scale.
Folded
Closed, it is a short, wide, thick phone.
Closed, you use iPhone Duo on its 5.4-inch outer display (13.6 sq in). That is the smallest screen on any current iPhone, in a body that is wider and heavier than all of them. Each row says how the folded Duo compares with that iPhone.
| iPhone | Size (H × W × D) | Weight | Screen | iPhone Duo folded is… | Compare |
|---|---|---|---|---|---|
| iPhone Duo (folded) | 117.8 × 84.1 × 11.3 mm | 254 g | 5.4″ outer | — | — |
| iPhone 18 Pro Max | 163.4 × 78 × 8.75 mm | 249 g | 6.9″ | 45.6 mm shorter, 6.1 mm wider, 2.55 mm thicker, 5 g heavier | Duo vs 18 Pro Max |
| iPhone Air | 156.2 × 74.7 × 5.64 mm | 165 g | 6.5″ | 38.4 mm shorter, 9.4 mm wider, 5.66 mm thicker, 89 g heavier | Duo vs Air |
| iPhone 18 Pro | 150 × 71.9 × 8.75 mm | 211 g | 6.3″ | 32.2 mm shorter, 12.2 mm wider, 2.55 mm thicker, 43 g heavier | Duo vs 18 Pro |
| iPhone 17 | 149.6 × 71.5 × 7.95 mm | 177 g | 6.3″ | 31.8 mm shorter, 12.6 mm wider, 3.35 mm thicker, 77 g heavier | Duo vs 17 |
| iPhone 16 | 147.6 × 71.6 × 7.8 mm | 170 g | 6.1″ | 29.8 mm shorter, 12.5 mm wider, 3.5 mm thicker, 84 g heavier | Duo vs 16 |
| iPhone 17e | 146.7 × 71.5 × 7.8 mm | 169 g | 6.1″ | 28.9 mm shorter, 12.6 mm wider, 3.5 mm thicker, 85 g heavier | Duo vs 17e |
Unfolded
Open, it is a small tablet.
Unfolded, iPhone Duo is 164.6 × 117.8 mm and only 5.2 mm thin, with a 7.6-inch folding display of 1878 × 2670 pixels. Screen size by diagonal undersells it, because the open Duo is almost square: by area it has about 27.2 sq in of screen. The table compares that area with each iPhone's screen, and with iPad mini.
| Device | Screen | Screen area | Duo open has… | Width |
|---|---|---|---|---|
| iPhone Duo (open) | 7.6″ · 1878 × 2670 | 27.2 sq in | — | 164.6 mm |
| iPhone 18 Pro Max | 6.9″ · 2868 × 1320 | 18.1 sq in | 50% more area | 78 mm |
| iPhone Air | 6.5″ · 2736 × 1260 | 16.1 sq in | 69% more area | 74.7 mm |
| iPhone 18 Pro | 6.3″ · 2622 × 1206 | 15.1 sq in | 80% more area | 71.9 mm |
| iPhone 17 | 6.3″ · 2622 × 1206 | 15.1 sq in | 80% more area | 71.5 mm |
| iPhone 16 | 6.1″ · 2556 × 1179 | 14.2 sq in | 92% more area | 71.6 mm |
| iPhone 17e | 6.1″ · 2532 × 1170 | 14.2 sq in | 92% more area | 71.5 mm |
| iPad mini (A17 Pro) | 8.3″ · 2266 × 1488 | 31.6 sq in | 14% less area | 134.8 mm |
Screen area is worked out from Apple's diagonal and pixel grid as a full rectangle; Apple notes the rounded corners make the visible area slightly smaller on every model. Sources: iPhone Duo technical specifications, each model's Apple spec page (linked on its model page) and iPad mini technical specifications, checked October 2026.
Who it suits
Duo or a regular iPhone?
- Pick iPhone Duo if you read, edit or watch a lot on your phone and would otherwise carry an iPad mini: open, it gives 50% more screen than the biggest slab iPhone, and it takes Apple Pencil (USB-C).
- Pick iPhone 18 Pro Max if you want the biggest screen without a fold: it is 5 g lighter, 8.75 mm thick against 11.3 mm, has three rear cameras to the Duo's two and starts $700 lower.
- Pick iPhone Air if weight is what you notice: at 165 g it is 89 g lighter than the Duo.
- iPhone Duo unlocks with Touch ID in the side button; every other current iPhone uses Face ID.
Latest changes
What changed for iPhone Duo
What changed since launch that could change your pick. All changes by month
Japan and South Korea restrict Duo and Pro Max walk-in purchases
Apple’s local pages say iPhone Duo and iPhone 18 Pro Max cannot currently be bought on a walk-in basis at Apple Stores in Japan and South Korea. Japan requires a reservation; South Korea directs shoppers to order online for delivery or pickup. The notices give no end date and do not establish policy in other countries. Official pages checked October 19, 2026.
Source: Apple Japan (South Korea also checked in the analysis) ↗Verizon will charge $10 a month for iPhone Handoff
iPhone Handoff, new in iOS 27, lets one phone number move between two iPhones, for example an iPhone Duo for going out and an iPhone 18 Pro for work. You choose which iPhone is active and can switch at any time. Verizon says it will support Handoff for $10 a month on compatible iPhones running iOS 27, and calls it coming soon without a start date. Other carriers set their own price, so ask yours before you plan on carrying two iPhones.
Source: Verizon ↗iPhone Duo pre-orders open, in stores October 23
Apple opened pre-orders for iPhone Duo on October 16. It starts at $1,999 in the US and reaches stores on Friday, October 23.
Source: Apple Newsroom ↗
What reviewers say
On iPhone Duo
Their conclusions, in our words. Follow the links for the full reviews.
Tom's Guide · Oct 2026
An opinion piece: the writer found the excitement around the Duo made their brand-new 18 Pro Max feel unexciting, a useful gut-check for buyers torn between the two.
My iPhone 18 Pro Max just got delivered and I immediately regret the purchase — and I think iPhone Duo is to blame ↗9to5Mac · Oct 2026
A spec-by-spec rundown that leans practical: with Duo orders already slipping into 2027, the 18 Pro is the pick for anyone who needs a phone soon.
iPhone Duo vs iPhone 18 Pro: Here’s every key difference ↗MacRumors · Oct 2026
The Duo's extra cost buys a big folding screen and side-by-side multitasking, while the Pro models keep the more versatile cameras, Face ID and a much lower price.
iPhone 18 Pro vs. iPhone Duo Buyer's Guide: Which Should You Choose? ↗CNET · Oct 2026
CNET sees the Duo as a niche buy for people who want a pocketable reading and multitasking screen, and points camera, battery and durability buyers to the iPhone 18 Pro Max instead.
The $2,000 Duo: Who Is Apple's First Folding iPhone Actually For? ↗
More reviewer perspectives (3)
CNET · Sep 2026
Hands-on: a smooth, premium hinge and Apple Pencil support, but only two rear cameras and Touch ID instead of Face ID at a $1,999 starting price.
I Got My Hands on the iPhone Duo, Apple's First Foldable Phone ↗Yahoo Tech · Sep 2026
Pick the Duo for screen space and if you simply want a foldable; pick the 18 Pro Max for photography, video and the best camera controls.
Apple iPhone Duo vs. iPhone 18 Pro Max: How to decide between them ↗ZDNET · Sep 2026
Sticks with the 18 Pro: the Duo has no Pro camera controls or telephoto, swaps Face ID for Touch ID, is awkward one-handed when open and costs $800 more at 512GB.
iPhone Duo or 18 Pro? 8 reasons why I'm skipping Apple's first foldable ↗
FAQ
Questions people ask
- How big is iPhone Duo folded?
- 117.8 × 84.1 × 11.3 mm and 254 g, with a 5.4-inch outer display. Against iPhone 18 Pro Max (163.4 × 78 mm) it is 45.6 mm shorter, 6.1 mm wider, 2.55 mm thicker, 5 g heavier.
- How big is iPhone Duo unfolded?
- 164.6 × 117.8 × 5.2 mm, with a 7.6-inch folding display (1878 × 2670 pixels at 430 ppi). That is about 27.2 sq in of screen, against 31.6 sq in on an 8.3-inch iPad mini.
- Is iPhone Duo heavier than iPhone 18 Pro Max?
- Yes. iPhone Duo weighs 254 g and iPhone 18 Pro Max weighs 249 g, so the Duo is 5 g heavier. It is 89 g heavier than the lightest iPhone on sale, iPhone Air (165 g).
- Does iPhone Duo fit in a pocket?
- Folded it is 45.6 mm shorter than iPhone 18 Pro Max, so it sits lower in a pocket, but it is 6.1 mm wider and 2.55 mm thicker. A pocket that takes a Pro Max by width will need the extra 6.1 mm.
- Can iPhone Duo share a phone number with my other iPhone?
- Yes, with iPhone Handoff in iOS 27, if your carrier supports it. One number moves between two iPhones, such as a Duo and an iPhone 18 Pro, and you pick which one is active. Verizon will charge $10 a month for it and calls it coming soon; other carriers set their own price.
- Is the iPhone Duo screen as big as an iPad mini?
- Not quite. Unfolded, the Duo's 7.6-inch screen is about 27.2 sq in; the iPad mini's 8.3-inch screen is about 31.6 sq in, 16% more. The Duo screen is also a squarer shape.
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