My Review on Apple Duo Seven Things the Keynote Left Out

When we wrote up iPhone Duo from the keynote, we ended with a list of things nobody could judge from a stage: how visible the crease really is, whether the under-display camera is usable, and whether the software holds together outside Apple's own demo apps.

The first hands-on sessions have now happened, and several of those answers are not the ones the keynote implied.

A note on what this is. We have not held an iPhone Duo. Everything below comes from early hands-on coverage — the specifications and prices are matters of fact, and the judgements are the reviewers', credited as such. You can watch the hands-on this post draws on here.

1. There is no telephoto lens

This is the big one, and it never came up on stage.

iPhone Duo has two rear cameras — a main and an ultra-wide. There is no telephoto. Reviewers who handled it put the camera system closer to the base iPhone 17 than to an 18 Pro: less detail, less natural background separation.

On a $1,999 phone, that stings more than the spec sheet suggests. A telephoto is not just about reaching distant subjects — it is the lens that flatters faces, because you can frame a portrait without pushing a wide lens into someone's nose. Losing it changes what the most expensive iPhone ever made is actually good at photographing.

If cameras are your reason to buy, the iPhone 18 Pro is the better phone. That is an odd sentence to write about a device costing $700 more.

2. Both selfie cameras are compromises

The outer camera shoots 12MP, against 18MP on Apple's other current phones. It does keep the ability to shoot vertically and horizontally without turning the phone.

The inner camera — the one hidden under the display, which Apple presented as an engineering triumph — is the part reviewers were least kind about. Two problems:

• Image quality is poor. It is the clearest weak point in an otherwise premium device.
• It is not actually invisible. The patch of screen above it has a visibly different texture from the rest of the display, so you can find it even when it is not in use.

There is a workaround, and it is a decent one: because the phone stands up on its own, you can shoot selfies on the far better rear cameras while previewing yourself on the outer screen. Apple also built a feature that plays animations to get children to look at the lens. It works — it is just not the fastest way to take a selfie.

3. Only the inner screen got the anti-reflective treatment

The nano-texture finish on the inner display drew the single most enthusiastic reaction of the hands-on: reviewers called it the least reflective phone screen they had seen.

The outer 5.4-inch display appears to have no equivalent coating, and is described as prone to glare.

That is a strange split, because the outer screen is the one you use outdoors, one-handed, in daylight — precisely the conditions where reflections matter most.

4. The crease is real, but genuinely close to gone

Here the hands-on coverage backs Apple up. The crease exists, but reviewers described it as the least visible on any foldable so far — easier to feel with a finger than to see.

Given how much stage time Apple spent on the multi-layer lamination and the laser-written nano-texture, this one landed.

5. It is thicker than expected, and too wide for one hand

5.2mm when opened — noticeably thicker than Samsung's comparable foldable. Apple called it the thinnest iPhone ever, which is true of iPhones and not of foldables.

Reviewers did not treat the thickness as a flaw. The phone reads as unusually solid, and it still carries an IP68 rating, three speakers, a vapour chamber and MagSafe — the last of which almost no foldable manages.

The width is the real ergonomic cost. The passport-shaped body is lovely to hold, but everyday one-handed reaches — widgets, pulling down for Siri — were described as an uncomfortable stretch. The volume buttons sit on the top edge, which is unusual, and Camera Control is retained while the Action Button is not.

6. Touch ID is a daily friction, not a footnote

We flagged the switch from Face ID to Touch ID in the side button as a sensible engineering compromise — a device with two open states cannot easily carry two Face ID arrays.

In use, reviewers framed it more bluntly: it is a step backwards, and you feel it every time you authenticate. It is better placed than the old home button, and you can enrol several fingers for different grips, but Face ID's advantage was that you never thought about it at all.

7. Every iPhone just got $100 more expensive

The pricing story is bigger than the foldable.

Two details that did not make the keynote:

• Storage steps got steeper. The jump from 512GB to 1TB used to cost $200. It now costs $400.
• There is no base iPhone 18 and no iPhone Air this year. The line-up narrowed to make room for the foldable.

A fully specced iPhone Duo at $3,199 costs more than a great many used cars.

What the software actually feels like

The hands-on coverage was consistently positive here, and it is worth separating from the hardware complaints.

The thing reviewers kept returning to was not any single feature but the handoffs — folding, unfolding, rotating, moving an app from the outer screen to the inner one, opening a second app beside it. Other foldables have done all of these individually. Apple is credited with being the first to make every transition between them feel continuous.

Specifics that impressed:

• Apps get iPad-style layouts on the inner display and compact phone layouts on the outer one, correctly formatted rather than stretched.
• Split View by dragging an app to one side, with drag-and-drop between the two.
• App pairing by tapping the divider, so two apps behave as one unit you can leave and return to.
• Partial-fold mode exposing secondary controls in some apps.
• StandBy folded into everyday use — prop the phone up and it switches to a calmer, less distracting interface.
• Rotation handled in all orientations, iPad-style.

The caveat reviewers raised is the right one: all of this was tried in apps Apple chose. Whether the rest of the App Store is this well adapted is the question that only weeks of ordinary use will answer.

And a sceptical note on variable aperture

Our iPhone 18 Pro post called the variable aperture the most interesting camera change in years. Hands-on reviewers pushed back on how much it matters, and the argument is worth hearing.

Opening the aperture wider is straightforwardly good — more light, more detail, more background separation. But narrowing it, which is the half Apple demonstrated most, is inherently niche. Samsung shipped a variable aperture in 2018 and dropped it by 2020, and very few people asked for it back.

The more useful takeaway from that section of the keynote may be the Pro controls rather than the aperture itself: manual shutter speed, white balance and a histogram, built into the stock camera app instead of requiring a third-party one. Along with double-tap subject focus tracking and the ability to add the cinematic effect after filming, that is the part working photographers will use daily.

Where this leaves the Duo

The consistent verdict from people who have held one is that iPhone Duo is the most complete foldable so far — and still not the iPhone most people should buy.

Apple waited seven years, let other companies make the mistakes, and spent its effort on refinement rather than invention. The result is a first-generation product with second-generation polish. What it is not is the best camera in the line-up, the easiest phone to use one-handed, or remotely good value.

For most people the answer is still an iPhone 18 Pro. The Duo is for people who genuinely want a tablet that folds into a pocket, and who can absorb what it costs.

Pre-orders open 16 October, with the phone on sale 23 October — enough time for full reviews, which is where the under-display camera and the outer-screen glare will get properly measured rather than eyeballed.

Specifications and prices in this article are drawn from Apple's keynote and from early hands-on coverage; the hands-on impressions are the reviewers' own and are credited to them. For the full announcement, see our Apple event recap and what is new in iOS 27.