Head to head · October 2026
iPhone Air vs iPhone Duo
iPhone Duo is 38.4 mm shorter and 89 g heavier than iPhone Air, with a 1.1″ bigger screen and 17 more hours of video.
Pick iPhone Air for
- Light in the pocket
- Budget
From $1,099
Pick iPhone Duo for
- Big-screen viewing
- Battery first
- Photography
- Keeping it for years
- Tablet in your pocket
From $1,999
Our verdict
Which one should you buy?
Choose iPhone Air if…
- weight matters: it is 89 g lighter.
- price decides it: it starts $900 lower at Apple.
Choose iPhone Duo if…
- you want the bigger screen: 7.6″ against 6.5″.
- battery life comes first: up to 44 hours of video against 27.
- you shoot a lot of photos: Dual 48MP rear cameras against Single 48MP.
- you keep phones for years: the newer A20 Pro chip will get software updates for longer.
- you want a tablet-sized screen that folds into your pocket.
Side by side
Next to each other, to scale.
Unfolded
With iPhone Duo open.
Open, iPhone Duo is 164.6 × 117.8 × 5.2 mm with a 7.6-inch folding screen; iPhone Air has a 6.5-inch screen. iPhone Duo folded and unfolded against every iPhone →
Screen size
6.5″ vs 7.6″
iPhone Duo has the bigger screen: 7.6 inches (its inner folding screen; folded it shows a 5.4-inch outer screen) against 6.5 inches on iPhone Air, about 69% more glass (175.4 cm² against 103.6 cm²). iPhone Duo shows 1878 × 2670 pixels at 430 ppi and iPhone Air 2736 × 1260 at 460 ppi.
| Screen | iPhone Air | iPhone Duo |
|---|---|---|
| Diagonal | 6.5″ | 7.6″ |
| Approx. area | 103.6 cm² | 175.4 cm² |
| Resolution | 2736 × 1260 | 1878 × 2670 |
| Pixel density | 460 ppi | 430 ppi |
| Refresh rate | 120 Hz | 120 Hz |
Price
$1,099 vs $1,999
iPhone Air is the cheaper one: it starts at $1,099 at Apple in the US, $900 less than iPhone Duo at $1,999. The table shows every storage option and what each gigabyte costs.
| Storage | iPhone Air | iPhone Duo |
|---|---|---|
| 256 GB | $1,099 · $4.29/GB | $1,999 · $7.81/GB |
| 512 GB | $1,299 · $2.54/GB | $2,199 · $4.29/GB |
| 1 TB | $1,699 · $1.66/GB | $2,599 · $2.54/GB |
| 2 TB | — | $3,199 · $1.56/GB |
Full specifications
Every figure, side by side.
| Spec | iPhone Air | iPhone Duo |
|---|---|---|
| Introduced | 2025 | 2026 |
| Apple sells it new | Yes, from $1,099 | Yes, from $1,999 |
| Height | 156.2 mm | 117.8 mm |
| Width | 74.7 mm | 84.1 mm folded · 164.6 mm open |
| Thickness | 5.64 mm | 11.3 mm folded · 5.2 mm open |
| Weight | 165 g | 254 g |
| Display | 6.5″ | 7.6″ inner · 5.4″ outer |
| Resolution | 2736 × 1260 at 460 ppi | 1878 × 2670 at 430 ppi inner · 1398 × 2034 at 460 ppi outer |
| Refresh rate | 120 Hz ProMotion | 120 Hz ProMotion |
| Top of screen | Dynamic Island | Dynamic Island |
| Unlock | Face ID | Touch ID in the side button |
| Chip | A19 Pro | A20 Pro |
| Rear cameras | Single 48MP | Dual 48MP |
| Video playback | Up to 27 h | Up to 44 h |
| RAM | 12 GB | Not confirmed (12 GB expected) |
| Storage | 256 GB, 512 GB, 1 TB | 256 GB, 512 GB, 1 TB, 2 TB |
| US price by storage | 256 GB $1,099 ($4.29/GB) · 512 GB $1,299 ($2.54/GB) · 1 TB $1,699 ($1.66/GB) | 256 GB $1,999 ($7.81/GB) · 512 GB $2,199 ($4.29/GB) · 1 TB $2,599 ($2.54/GB) · 2 TB $3,199 ($1.56/GB) |
| Colors | 4: Space Black, Cloud White, Light Gold, Sky Blue | 2: Night Sky, Star White |
Sources: Apple technical specifications for iPhone Air and iPhone Duo; US prices from apple.com, checked October 2026. Apple does not publish RAM; it comes from Apple's Xcode device data as reported by MacRumors, or Wikipedia's list of iPhone models for older phones.
What reviewers say
Air or 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
- Is iPhone Air bigger than iPhone Duo?
- iPhone Air measures 156.2 × 74.7 × 5.64 mm and iPhone Duo measures 117.8 × 84.1 × 11.3 mm, so iPhone Air is 38.4 mm taller and 9.4 mm narrower (the foldable measured folded).
- Will an iPhone Duo case fit iPhone Air?
- No. The bodies differ by 38.4 mm in height, 9.4 mm in width and 5.66 mm in thickness, and cases are cut to within a fraction of a millimetre. Buy a case made for your exact model.
- Which has better battery life, iPhone Air or iPhone Duo?
- iPhone Duo. Apple rates it for up to 44 hours of video playback against 27 hours for iPhone Air.
- Is the iPhone Duo screen bigger than iPhone Air?
- iPhone Duo has the bigger screen: 7.6 inches (its inner folding screen; folded it shows a 5.4-inch outer screen) against 6.5 inches on iPhone Air, about 69% more glass (175.4 cm² against 103.6 cm²). iPhone Duo shows 1878 × 2670 pixels at 430 ppi and iPhone Air 2736 × 1260 at 460 ppi.
- Which is lighter?
- iPhone Air weighs 165 g, 89 g less than iPhone Duo (254 g).
- How much more does iPhone Duo cost than iPhone Air?
- iPhone Air is the cheaper one: it starts at $1,099 at Apple in the US, $900 less than iPhone Duo at $1,999. The table shows every storage option and what each gigabyte costs.
Keep comparing
Related match-ups.
News & analysis
What changes your choice.
Sourced news, with the comparison and buying implications explained. All news & analysis →
iPhone Duo in Japan and Korea: Reserve Before You Go
Apple limits walk-in sales of iPhone Duo and 18 Pro Max in Japan and South Korea. What to check before visiting a store or planning a purchase abroad.
Verizon iPhone Handoff Costs $120 a Year: Who Benefits?
Verizon plans to charge $10 a month to move one number between two iPhones. Here is the extra annual cost and what to check before buying a second phone.