Apple
iPhone Duo

The iPhone Duo is far more versatile than the iPhone Air thanks to its second, tablet-sized screen. But it’s also heavier and much more expensive. Pros
Two screens
More cameras
Better battery life

Cons
Far more expensive
Heavier
No Face ID

Apple
iPhone Air

The iPhone Air is slim, stylish, lightweight, and a much cheaper option than the iPhone Duo, but it can’t match Apple’s foldable for photography or versatility. Pros
Slim and light
Relatively affordable
High-quality screen

Cons
Only one rear camera
Low battery capacity
Less powerful

The iPhone Duo and iPhone Air are both oddities in Apple’s current smartphone lineup. There’s only one of each, and they meet fundamentally different user needs. Sure, they’re both extremely sleek and slim (assuming we’re talking about the iPhone Duo in its unfolded form), and they share some other similarities. But for the most part, these two iPhones couldn’t be more distinct. In this article, then, we’ve compared the iPhone Duo and iPhone Duo in full, to help you decide which model is right for you. iPhone Duo vs iPhone Air: specs comparison
The iPhone Duo Lance Ulanoff / Future The iPhone Air Jacob Krol/Future The chart below shows the core specs of both handsets, so you can see at a glance how they compare. iPhone Duo
iPhone Air
Dimensions:
117. 8 x 84. 1 x 11. 3mm (folded) / 117. 8 x 164. 6 x 5. 2mm (unfolded)
156. 2 x 74. 7 x 5. 6mm
Weight:
254g
165g
Display:
7. 6-inch Super Retina XDR OLED (foldable) / 5. 4-inch Super Retina XDR OLED (cover)
6. 5-inch Super Retina XDR OLED
Refresh rate:
1Hz–120Hz
1Hz–120Hz
Peak brightness:
3,000 nits
3,000 nits
Chipset:
A20 Pro
A19 Pro
RAM:
12GB
12GB
Rear cameras:
48MP main, 48MP ultra-wide
48MP main
Front camera:
12MP cover, 4MP under-display
18MP
Battery:
4,883mAh
3,149mAh
Charging:
50% in 20 minutes
50% in 30 minutes
Storage:
256GB / 512GB / 1TB / 2TB
256GB / 512GB / 1TB

iPhone Duo vs iPhone Air: price and availability
The iPhone Duo Lance Ulanoff / Future The iPhone Air Jacob Krol/Future The iPhone Duo was announced in September 2026 and began shipping in October, with the phone now widely available globally. The iPhone Air is a bit older, having launched back in September 2025, but with no successor yet available, you can still buy it. The Duo comes in four configurations, with the cheapest being a 256GB option for $1,999 / £1,999 / AU$3,499. Next up, there’s a 512GB version for $2,199 / £2,199 / AU$3,899, with a 1TB model costing $2,599 / £2,599 / AU$4,699, and a 2TB configuration coming in at $3,199 / £3,199 / AU$5,899. The iPhone Air also starts in a 256GB configuration, costing $1,099 / £1,099 / AU$1,899, while the 512GB model is $1,299 / £1,299 / AU$2,299, and the 1TB version is $1,699 / £1,699 / AU$3,099. There’s no 2TB version of this phone. So, the iPhone Duo’s starting price is some $900 / £900 / AU$1,600 higher than the iPhone Air’s, and to be honest, you’re unlikely to need to pay full price for Apple’s super slim handset. It’s regularly on sale at third-party retailers including Amazon, so the price gap between it and the iPhone Duo is $900 / £900 / AU$1,600 at worst . With the money you’d be saving by buying the Air, you could also buy an iPhone 17 or an iPad Air , which speaks to how expensive Apple’s first foldable phone is. Apple iPhone Duo pricing Storage
US price
UK price
AU price
256GB
$1,999. 99
£1,999
AU$3,499
512GB
$2,199
£2,199
AU$3,899
1TB
$2,599
£2,599
AU$4,699
2TB
$3,199
£3,199
AU$5,899

Apple iPhone Air pricing Storage
US price
UK price
AU price
256GB
$1,099
£1,099
AU$1,899
512GB
$1,299
£1,299
AU$2,299
1TB
$1,699
£1,699
AU$3,099

iPhone Duo vs iPhone Air: design
Future Future Both of these phones are, first and foremost, examples of beautiful design. With the iPhone Duo, Apple managed to make a remarkably slim phone that’s just 117. 8 x 164. 6 x 5. 2mm when unfolded. That makes it even thinner than the 156. 2 x 74. 7 x 5. 6mm iPhone Air — a phone that has a slim design as one of its main selling points. Of course, when folded shut — as it will be in your pocket — the iPhone Duo is rather chunkier at 117. 8 x 84. 1 x 11. 3mm. At 254g, the Duo also weighs a lot more than the Air, which clocks in at a remarkably light 165g. Before we move on, it’s worth reiterating that these measurements make the Air one of the most comfortable phones to use and hold over long periods. Its slimness might seem like a gimmick, but there’s a lot to be said for using a phone that feels almost weightless in your hand and pocket. The Duo is equally well-crafted and impressively thin when unfolded, but in day-to-day use, it feels significantly heavier and chunkier than the Air. But then, with two screens, that was inevitable. The iPhone Duo (folded) and iPhone Air Future The iPhone Duo (unfolded) and iPhone Air Future As far as durability goes, both phones have a Ceramic Shield 2 glass front, a Ceramic Shield glass back, and a titanium frame, and both also have an IP68 rating for dust and water resistance. Of course, foldables are inherently more fragile than single-screen phones like the iPhone Air, but you needn’t worry about the Duo breaking after a few folds — Apple has confirmed to TechRadar that the phone’s viral screen-cracking issue only affected a "small number of units" at launch. The iPhone Duo and iPhone Air also look somewhat similar from the back, with both having a horizontal camera block — though this block houses two lenses on the iPhone Duo, and just one on the iPhone Air. On the front, the Air has larger cutouts in its screen, allowing for Face ID — something the iPhone Duo lacks. And the two phones come in different colors, with the iPhone Duo being available in Night Sky and Star White shades, while the iPhone Air is sold in Space Black, Cloud White, Light Gold, and Sky Blue shades. So, there are as many differences as similarities here, but the designs of both phones shine, with our iPhone Duo review praising Apple’s foldable as “beautifully designed and engineered,” while our iPhone Air review called it “the freshest look that Apple has delivered in years.” These are two great-looking products. iPhone Duo vs iPhone Air: display
The iPhone Duo Lance Ulanoff / Future The iPhone Air Jacob Krol/Future You may not have noticed, but the iPhone Duo has two screens. Its main foldable display is a 7. 6-inch 1878 x 2670 LTPO Super Retina XDR OLED panel with 430 pixels per inch, a 120Hz refresh rate, a peak brightness of 3,000 nits, and an anti-glare nano-texture finish. Its smaller cover screen is a 5. 4-inch 1398 x 2034 LTPO Super Retina XDR OLED panel with 60 pixels per inch, a 120Hz refresh rate, and a peak brightness of 3,000 nits. The iPhone Air, of course, just has one screen — a 6…