It's more than just the name: Turns out iPhone Duo stole Surface Duo's biggest selling point, and Apple is right to copy it
Yesterday, Apple unveiled iPhone Duo, much to the dismay of the dozens of die-hard Surface Duo fans that opted for Microsoft's now defunct line of foldable phones. Of course, the name of the product was what drew immediate comparisons to Surface Duo, but as the keynote went on, it quickly became evident that it isn't just the name that Apple was interested in.
Ever since Surface Duo launched in 2020, I have heralded it as the best multitasking phone you could buy. No other folding phone, whether that be from Samsung, Huawei, Oppo, Honor, Xiaomi, or Google, have matched the Surface Duo from a pure multitasking perspective.
The dual-screen setup allowed for Microsoft to create a new user experience around the gap between the screens, and that led to a unique experience that made multitasking automatic. Open your app on one screen, and the other screen would remain on the home screen, available whenever you need it to begin another task.

If the second screen was free, opening links would open them on the other screen, allowing you to keep viewing the first app without it being obscured by your browser. You could swipe up from the bottom and drag the app across both screens, swapping them in place or spanning a single app across both screens for a totally immersive experience.
No other folding phone has ever matched this level of fluidity or multitasking prowess. Most single-screen folding phones opt to treat the large folding screen as a tablet screen, opening apps full screen and requiring gestures or modes to enter a special "multitasking view" that allows you to run the apps side by side. The OS isn't able to dynamically do this, unlike the Surface Duo.
Well, it turns out, iPhone Duo can. I've never seen another folding phone match the Surface Duo's multitasking design, but iPhone Duo does almost identically. In multiple demos, Apple shows the iPhone Duo opening an app, and letting users split it side by side with another app by dragging the app up and docking it to the left or right of the screen.

When you do this, the iPhone home screen appears on the other side, just like Surface Duo. From there, you can open another app, and swap sides with it by doing the same drag and drop gesture you do on Surface Duo. It even opens links in a browser next to your app automatically, just like Surface Duo.
Surface Duo had a lot of flaws, but one thing it got absolutely right was the fluidity and automagic-ness of its multitasking experience. Users were in control of where apps appeared, and it was easy to move apps between the two halves, and have them run side by side. In most instances, multitasking on Surface Duo was an automatic experience. I never had to cognitively initiate a multitasking mode, it automatically happened.
It looks like iPhone Duo is opting for the same design philosphy. User shouldn't need to initiate a complex gesture or mode to multitask. It should just happen when it makes the most sense. If you need to open an app next to your currently open one, just drag the app to the side and open the second app from your familiar home screen.
If you tap a link, it should open the browser next to your current app, not on top of it like so many other Android phones do. Both Surface Duo and iPhone Duo appear to do this correctly, and that's the biggest surprise in my book. It's not just the name Duo that Apple borrowed, it's the entire multitasking design ethos as well.
You can see this in action in this video:
I'm not even mad about it, I've always said that I wish another company built the Surface Duo, because it wasn't fair of Microsoft to debut the best multitasking experience I'd ever seen on a phone, only to kill the product two years later. Apple has taken the best of Surface Duo and implemented it onto its own iPhone Duo, which is a win for Surface Duo fans in my book.
And it's not just the software multitasking and windowing that Apple have copied. iPhone Duo also supports pen, another feature that was incredibly popular on Surface Duo. Many people used their Surface Duo's as a personal diary or note taking device, and it did that quite well. iPhone Duo also supports pen input via the Apple Pencil, which is awesome to see.
I think Apple even indirectly referenced the Surface Duo during their keynote. At the start of the iPhone Duo segment, Apple says "others have created foldables that just feel like two phones awkwardly stuck together." The only folding phone that was literally two phone screens stuck together was Surface Duo.
Apple is right in that you can mimic the setup of a dual-screen phone 100% on a single screen folding phone, and that's exactly what they've done with iPhone Duo. All the dual-screen multitasking behaviors have been implemented on the folding screen, and it still works great.
Surface Duo fans, I fear we may finally have our Surface Duo 3 in the form of iPhone Duo. Too bad it costs $2,000.

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