Apple iPhone Duo vs. Xiaomi 18 Fold: Software matters

Heavyweight
The iPhone Duo is heavier and thicker than Android foldables, but that isn’t going to make too much of a difference in day-to-day use. The plus point is that it has IP68 ingress protection, and a build quality that’s different to anything else we’ve seen on Android. Also, the software is the biggest differentiator, and the little I’ve seen of this makes me highly interested to use the iPhone Duo.

Sublime
Make no mistake: the Xiaomi 18 Fold has the best design of any wide foldable, and Xiaomi deserves credit for slotting in a dedicated tele lens into the device. It is a full 35g lighter than the iPhone Duo, but you still somehow get a huge 6,000mAh battery. The custom Xring 03 silicon is intriguing, and the only issue with the 18 Fold is that it is limited to China, so you don’t get the best software — there’s no Play Store or other Google services.
Apple iPhone Duo vs. Xiaomi 18 Fold: Design and display

I like the design of wide foldables as they’re much easier to hold and use than traditional book-style devices like the Galaxy Z Fold 8 Ultra and Pixel 11 Pro Fold. The iPhone Duo looks interesting thanks to the 5.4-inch outer panel, and it unfolds to a 7.6-inch inner panel. The Xiaomi 18 Fold has similarly-sized displays as well, but when it comes to resolution, the iPhone Duo comes out ahead.
That said, the biggest issue with the iPhone Duo is the weight; at 254g, it is the heaviest of any 2026 foldable, and the Xiaomi 18 Fold is 35g lighter. Now, to give you some context, it is 5g heavier than the iPhone 18 Pro Max, but the point stands that it is a hefty device. Obviously, we’ll need to see how that makes a difference in daily use; weight distribution matters a lot on a foldable, and I’ll share findings once I used the Duo.

What I like is that the Duo gets IP68 dust and water resistance. It is the only foldable other Google’s Pixel 11 Pro Fold and 10 Pro Fold to have this feature, and it will make a genuine difference in regular use. The 18 Fold has IP58 and IP59 ingress protection, and it should do a good enough job in outdoor use.
Also, the design itself is exquisite on the Duo, and the blue color looks stunning. Something you don’t see (but will make a difference) is the inner panel. The iPhone Duo uses layers of ultra-thin glass sandwiched over the panels, and it should give it much better resilience against deformation — which is an issue with most foldables. Xiaomi, to its credit, delivered what is arguably the best-looking wide foldable in the 18 Fold, and the svelte design along with the bright red hue is brilliant.
Apple iPhone Duo vs. Xiaomi 18 Fold: Hardware

What’s notable about the internals is that both foldables use custom silicon. The iPhone Duo uses the latest A20 Pro, and the 2nm platform has much better power than last year, and it should deliver meaningful upgrades on the battery side of things. Xiaomi is using the Xring 03 silicon with the 18 Fold, and I’m excited to get my hands so I can test it — it’s not often we get a new player that can beat Qualcomm at its own game.
Xiaomi also has a distinct advantage with the battery, and the 18 Fold has a 6,000mAh battery that easily lasts over a day. the iPhone Duo should last a day as well, but this is something I’ll need to test. The 18 Fold has 67W USB PD charging tech, but what I like is that the iPhone Duo has 25W MagSafe, making it that much more convenient to use. Annoyingly, Xiaomi doesn’t have built-in magnets, so you can’t just use a Qi 2.2 charger with the device.
Category | Apple iPhone Duo | Xiaomi 18 Fold |
Display | Outer: 5.4-inch ProMotion LTPO OLED, 2034x1398 Inner: 7.6-inch ProMotion LTPO OLED, 2670x1878 | Outer: 5.38-inch LTPO AMOLED, 1712x1168 Inner: 7.58-inch LTPO AMOLED, 2364x1672 |
Operating System | iOS 27, at least seven updates | Android 17 |
Chipset | Apple A20 Pro, 2nm | Xiaomi XRing O3, 3nm |
RAM | 12GB | 12GB/16GB |
Storage | 256GB, 512GB, 1TB, 2TB | 256GB, 512GB, 1TB |
Rear cameras | Main: 48MP f/1.6, sensor-shift OIS Wide-angle: 48MP f/2.2 | Main: 200MP f/1.7, OIS Tele: 50MP f/2.8, 3x tele Wide-angle: 50MP f/2.4 |
Front camera | 12MP | 16MP |
Ingress Protection | IP68 | IP58/IP59 |
Battery | 4,700mAh | 6,000mAh |
Charging | 40W, 25W MagSafe/Qi 2 | 67W PD 3.0, 50W HyperCharge |
Dimensions | Folded: 117.8 x 84.1 x 11.3mm Unfolded: 117.8 x 164.6 x 5.2mm | Folded: 83.6 x 117.8 x 10.7mm Unfolded:163.8 x 117.8 x 5.0mm |
Weight | 254g | 219g |
Colors | Night Sky, Star White | Red, Rose gold, Silver, Grey |
The iPhone Duo has two 48MP cameras — a main camera and wide-angle lens — but you don’t get a telephoto lens. This is annoying, as the tele lens is the one I use the most. That’s why it’s refreshing to see Xiaomi providing the lens on the 18 Fold; its foldable has a 200MP main camera, 50MP tele lens with 3x optical zoom, and a 50MP wide-angle lens. Just having a tele lens gives the device a huge advantage, and Xiaomi is the only brand doing so on a wide foldable.
Apple iPhone Duo vs. Xiaomi 18 Fold: Software

Where the iPhone Duo has a sizable lead is the software; it’s clear that iOS 27 has plenty of custom features to maximize the real estate on the foldable. What’s great to see is that the toggles and the taskbar are oriented on the right, and while it’s a small thing, it makes a difference in usability.
The main problem with the Xiaomi 18 Fold is that it is limited to China, so you have to use the Chinese iteration of the brand’s skin. There are issues with push notifications, aggressive memory management, and there’s no Play Store or Google services out of the box. If you're an enthusiast and have used Chinese software previously, you can wrangle the 18 Fold to work the way you want (I plan on doing that), but it is a hassle.
Apple iPhone Duo vs. Xiaomi 18 Fold: Which should you buy?

I’ll make this easy: if you like the look of a wide foldable, you should get the iPhone Duo. Although the Xiaomi 18 Fold has arguably better internals, the software is not ideal, and I wouldn’t recommend getting it as a result. Xiaomi needs to do a better job bringing its foldables to global regions, because the 18 Fold deserves a wide rollout.
Of course, the iPhone Duo is costlier than any other iPhone, but not by too much than the latest Pro models. There's no doubt that the 18 Fold gives you a better overall value (as these things go), but with Xiaomi choosing not to launch the foldable globally, this is a moot point.

Heavyweight
The iPhone Duo is the default choice if you need a wide foldable. The Xiaomi 18 Fold has better internals, but the Duo arguably has the better software, and it is launching in over 75 countries.
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