One costs $1,999 and folds into a tablet, the other costs $1,299 and shoots better photos. Here's how to choose, plus the crack issue.
Choosing between the iPhone Duo and the iPhone 18 Pro Max comes down to screen versus camera. The Duo, Apple's first foldable, starts at $1,999 in the US, £1,999 in the UK and $2,999 in Canada. It opens from a 5.4-inch phone into a 7.6-inch screen with half again the area of the Pro Max display, and it folds short enough for small pockets.
The Pro Max starts at $1,299 and is the better camera phone, with a telephoto lens, a variable aperture and Pro video tools the Duo doesn't have. It also keeps Face ID and is in stores now.
The iPhone Duo costs $1,999 and the iPhone 18 Pro Max costs $1,299, and that gap buys you a phone that turns into a small tablet, not a better camera. If you’re weighing iPhone Duo vs iPhone 18 Pro Max, the short answer is this: get the Pro Max if photos, video and a phone you can buy this week matter most. Get the Duo if you want the biggest screen Apple has ever put in a pocket and you can live with a first-generation device that is hard to find.
That second part matters more than usual this month. Apple has confirmed an inner-display problem on a small number of Duo units and has now sent repair guidance to its stores. So the choice isn’t just about specs. It’s about how much risk and waiting you’ll accept for something new.
For most people, the iPhone 18 Pro Max is the safer buy. It has the stronger camera system, a familiar design with no learning curve, Face ID, and it’s in stores now. The Duo is the more interesting phone, and one early review called it the most interesting iPhone since the original, but you pay a lot more for fewer camera features.
Both phones start with 256GB of storage, and the Duo sits far above the Pro Max at every step. In the US, Apple lists these starting prices:
In the UK, the Duo starts at £1,999, the same number as the US price, and the top 2TB model costs £3,199 in Britain and $3,199 in the US. Canadians pay more. The Duo runs from $2,999 to $4,799 in Canada before tax, almost 10 percent above the US price once you convert it. Trade experts told Canadian reporters the gap isn’t caused by tariffs, since the phone is built in China, and that Canadian buyers of a super-premium phone are simply seen as less sensitive to price.
We couldn’t confirm UK and Canadian prices for the Pro Max from current sources, so check Apple’s store in your country before you decide. Monthly financing is one place the Duo looks less scary: Apple’s US store shows about $83.29 a month, and the UK store shows about £66.63.
Yes, mostly. Folded, the Duo is much shorter than the Pro Max, so it slips into small pockets that a 6.9-inch phone won’t. It’s wider and thicker, though. Here’s how they compare:
Don’t buy either one if you want a light phone. Both are heavy, and anyone coming from an iPhone Air or iPhone 17 will notice. The Air weighs 165 grams and the iPhone 17 weighs 177 grams.
The Pro Max gives you a single 6.9-inch display, the largest on any regular iPhone. The Duo gives you two: a 5.4-inch outer screen for quick tasks and a 7.6-inch folding screen inside. Apple says the inner panel has 50 percent more screen area than the Pro Max.
That inner screen has a matte nano-texture coating to cut glare and make the crease less visible, a first on an iPhone. iOS 27 adds fold-only tricks like Split View, hands-free FaceTime and a half-folded StandBy mode, and the iOS 27.2 update added Apple Pencil (USB-C) support for the Duo. If your phone doubles as an e-reader, notepad or travel TV, this is where the Duo earns its price.
The Pro Max wins on cameras, and it isn’t close. Both phones share the A20 Pro chip, but Apple held back camera hardware on the Duo to make the fold work.
The Duo has a few clever tricks of its own. Kid Cue, Smart Take and Duo Preview use the outer screen so the person you’re photographing can see the shot. Creators who film themselves may like that, but serious photographers should get the Pro Max.
Battery life is close. Apple quotes up to 45 hours of video playback for the Pro Max. The Duo, with its dual-battery design, is rated at up to 44 hours on the outer screen and up to 31 hours on the big inner one, so heavy inner-screen users will charge more often.
Other differences you’ll live with every day:
This is the biggest reason to pause. Within days of the Duo reaching buyers on October 23, some owners reported cracks and lines on the inner screen, usually down the middle or toward the right side. On October 26, Apple said the problem affects a small number of units and told owners to contact AppleCare for a replacement.
This week Apple went further and sent a memo to its stores and authorized service providers telling technicians to inspect affected phones and repair or replace them under normal procedures. Apple says most units aren’t at risk, and that phones with the flaw tend to show it soon after you start using them. There’s no recall and no public repair program page yet. iFixit thinks a faulty hinge is to blame, but Apple hasn’t named a cause.
What that means for you in practice:
The Pro Max has none of these questions. It uses the same proven design as the iPhone 17 Pro Max.
Not quickly. The first Duo allocations sold out fast. As of launch day, Apple quoted January 22, 2027 for a 256GB Duo in the US and January 25, 2027 in the UK. Apple called demand nothing short of extraordinary, and earlier reports pointed to low production yields as well. Walk-in stock exists in small amounts, so checking your local Apple Store each morning can work. The iPhone 18 Pro Max, by contrast, has been on sale since September.
It’s better for reading, video and multitasking thanks to the 7.6-inch inner screen. The Pro Max is better for photos, video recording and zoom, and it costs far less in every country we checked.
Slightly. The Duo weighs 254 grams and the Pro Max weighs 249 grams.
If you’re nervous, waiting costs little, because new orders won’t arrive until late January anyway. Apple says only a small number of units are affected and will replace them through AppleCare.
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