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iPhone Duo: The iPhone Folds for the First Time in 19 Years
Nineteen years after Apple introduced the iPhone, the company has entered the foldable market for the first time. The iPhone Duo is more than just a smartphone with a folding screen. It could reshape the competitive landscape of a foldable market long led by Samsung Electronics, while also blurring the boundary between the iPhone and the iPad.
When folded, it works like a conventional smartphone with a 5.4-inch outer display. Open it up, and a large 7.6-inch screen is revealed. Thanks to its book-style design, which opens from left to right like the pages of a book, the device gives the impression of combining a compact iPhone and a mini tablet into a single product.
The true strength of the iPhone Duo lies not simply in its larger screen, but in how that screen can be used. When unfolded, it can run two apps simultaneously, allowing users to watch a video or attend a video conference on one side while taking notes or browsing the web on the other. Editing a photo while sending the finished result through a messenger app could also become a much more seamless experience.
With Apple Pencil support added to the mix, the product’s identity becomes even clearer. The iPhone Duo is designed to be more than a device for calls and messages—it aims to serve as a portable productivity device encompassing handwriting, drawing, document review, and content creation.
Of course, its starting domestic retail price of 3.29 million won is far beyond what most people would consider an easy purchase. Still, it is clear that Apple designed the product not as a mainstream iPhone, but as a super-premium line centered on advanced technology and a distinctive user experience. The arrival of the iPhone Duo may signal that foldable phones are no longer devices reserved for a small group of early adopters, but are evolving into the next form of the smartphone.
iPhone Duo: Folds Like a Passport, Unfolds Like an iPad
At 5.4 inches when folded and 7.6 inches when unfolded, the core of the iPhone Duo is not simply about making the screen bigger. It can be used like a compact iPhone that fits comfortably in one hand, then unfolded like opening a book whenever needed to provide a workspace closer to that of a tablet.
In particular, the outer display when folded aims for a short, wide “passport-style form factor,” unlike the long, narrow design of conventional smartphones. It is expected to offer a stable grip in the hand and suit everyday tasks that can be handled quickly, such as checking messages, controlling music, browsing maps, and taking simple photos. It is a design that could challenge the long-standing perception that “a foldable phone only becomes truly useful once it is unfolded.”
7.6 Inches Unfolded: The Largest Display in iPhone History
When the iPhone Duo is opened, a 7.6-inch Super Retina XDR inner display is revealed. It is introduced as offering roughly 50% more screen area than the iPhone 18 Pro Max. The difference could be especially noticeable in tasks that benefit from a larger display, such as watching videos, browsing the web, editing photos, and reviewing documents.
Above all, this size targets the gap between smartphones and tablets. It is an iPhone that can fit in your pocket, yet when unfolded, it delivers a screen experience reminiscent of an iPad mini.
An iPhone in one hand, a small work tablet in both.
The question posed by the iPhone Duo’s form factor is clear: “How much can you really do with just one smartphone?”
Multitasking with the Screen Split in Two
The true value of a large display does not end with opening a single app at a larger size. On its unfolded screen, the iPhone Duo supports multitasking with two apps running simultaneously.
For example, you can display a video conference or lecture on the left while opening a notes app on the right to organize the content. While traveling, you could keep a map and messenger open side by side, or draft an email while selecting photos—both natural usage scenarios.
- Video watching + note-taking: Useful for online lectures, meetings, and interview summaries
- Browser + messenger: Check search results and share them in real time
- Photo editing + email: Review the results and send them immediately
- Maps + schedule management: View your route and appointment details on a single screen
This kind of experience feels less like a smartphone with a simply enlarged display and more like a mobile device designed to keep your workflow uninterrupted.
Not Just a “Foldable iPhone,” but a New Way to Use Screens
Of course, a 7.6-inch display is not necessary for everyone. If your main activities are making brief calls, using social media, and watching short videos, a standard iPhone may be more than enough. But for users who check documents on the go, create content, and move between multiple apps while working, the story is different.
The iPhone Duo is designed to deliver the productivity of a large screen without giving up one-handed usability. The combination of a short, wide outer display that folds like a passport and the largest inner screen in iPhone history makes it well worth watching to see how naturally the two come together in real-world use.
iPhone Duo: How Two Screens Transform Your Day
During video conferences, you often have to switch back and forth between screens just to take notes without missing something important. But the iPhone Duo turns its unfolded display into two separate workspaces. On the left, you can have the meeting screen or lecture video open, while on the right, you can launch Notes, Calendar, or Mail to organize everything you need on the spot.
This change goes far beyond simply having a larger screen. At work, you can review a document while replying to messages; on the go, you can watch a video while continuing a conversation with a friend. With less need to close and reopen apps, your daily workflow becomes smoother and more natural.
Apple Pencil support makes the iPhone Duo even more distinctive. You can handwrite key points during a meeting, annotate a PDF directly, or capture ideas in a quick sketch. That is why it feels natural to describe the device as a bridge between the portability of a smartphone and the productivity of an iPad.
- Meetings & lectures: Watch a video on one side while taking notes and searching for materials on the other
- Content consumption: Handle messages, comments, and searches while a video continues playing
- Work & study: Open email, documents, and your calendar side by side for quick organization
- Creative work: Draw, create planners, and annotate PDFs with Apple Pencil
Ultimately, the iPhone Duo is defined less by its “large screen” than by a workflow that never gets interrupted. Folded up, it is as easy to use as a familiar iPhone; when needed, unfold it and transform it into a productivity tool in your pocket. That experience could completely reshape the way you use your device throughout the day.
iPhone Duo: Who Is the KRW 3.29 Million Innovation Really For?
The domestic launch price of the iPhone Duo is KRW 3.29 million for the 256GB model, while the 2TB version costs a staggering KRW 5.09 million. That is enough to consider a premium laptop, an iPad Pro, or even a MacBook Air instead of a single smartphone. Simply being “an iPhone with a folding display” is not enough to make the price an easy decision.
Of course, there are clear features designed to justify the cost. The iPhone Duo comes with a titanium frame, IP68 dust and water resistance, a battery that can last up to 44 hours when folded, a large 7.6-inch display, and Apple Pencil support. It is less a conventional smartphone than a device designed to compress the roles of a smartphone and a tablet into one.
Who Is the iPhone Duo For?
The first users who come to mind are early adopters. For those eager to experience a new form factor and Apple’s first foldable UX before anyone else, the high price may feel less like a barrier and more like the cost of getting ahead of the technology curve.
It also offers real value for creators and professionals. Users can attend a video conference while taking notes on the unfolded screen, write emails while reviewing photos, or annotate PDF documents with an Apple Pencil. For people who need a small tablet-sized workspace even while on the move, the iPhone Duo could be a surprisingly compelling option.
For users who already rely on an iPhone, iPad, and Mac, it could also change how they divide tasks among their devices. If carrying an iPad everywhere has always felt burdensome, a foldable iPhone that can be folded into a pocket or a small bag may offer an appealing alternative.
It Is Not a Necessary Upgrade for Every iPhone User
On the other hand, people who mainly use their smartphones for messaging, social media, watching videos, and taking photos may find it difficult to justify the KRW 3.29 million price tag. Standard iPhone Pro models already offer powerful performance, highly polished cameras, and ample display sizes.
Its weight of 254g is another factor to consider, making it the heaviest iPhone ever. That heft is the price of a larger display, longer battery life, and more durable materials, but it is undeniably a burden for users who prioritize one-handed use and portability.
Ultimately, the iPhone Duo is not a mainstream flagship. It is closer to a super-premium productivity device for people who want to accomplish more with a single smartphone. The price is undeniably high, but for users who have long needed something to fill the gap between an iPhone and an iPad, it may feel less like the cost of innovation and more like an investment in reducing the number of devices they carry.
iPhone Duo: The Moment Apple Stepped onto Samsung’s Stage
The foldable phone market has long been Samsung’s stage. The Galaxy Z Fold and Z Flip have steadily advanced in both form factor and user experience, leading the market along the way. But with South Korea joining the United States, China, and Japan as one of the first-launch countries for the iPhone Duo, this stage now has more than one main character.
Apple’s entry is not simply the addition of another foldable phone. The fact that Apple has chosen to embrace foldables itself signals that the market is no longer a niche reserved for a handful of early adopters. It suggests that Apple has determined the technology, consumer demand, and app ecosystem have all reached a certain level of maturity.
In particular, the iPhone Duo focuses less on being a “foldable iPhone” and more on what you can do when it is unfolded. Using two apps simultaneously on its 7.6-inch large display, while continuing to take notes and draw with Apple Pencil, blurs the line between a smartphone and a tablet. On the move, it can be used like an iPhone; when work, learning, or creative tasks arise, it expands into something like a compact iPad.
This shift also raises questions about the roles of the iPad and Mac.
- For iPad mini users, it could become an option for consolidating their phone and tablet into a single device.
- For users who do a great deal of work on mobile, it opens up a new way of working, allowing them to handle email, documents, video conferences, and notes side by side on one screen.
- For Mac users, it could serve as an intermediate hub, allowing work begun on the iPhone to continue on a larger display.
Of course, starting at 3.29 million won, its price is far removed from that of mainstream smartphones. Rather than being a product designed solely to drive sales volume, the iPhone Duo is closer to a model that demonstrates Apple’s vision for the direction of super-premium mobile devices. In its early stages, its core customers are likely to be people such as early adopters, creators, and professionals who clearly recognize the value of a large display and productivity features.
In the end, the key point to watch is not the spec sheet but the ecosystem. Samsung can put forward its experience in foldable hardware, while Apple can leverage a powerful software experience that connects the iPhone, iPad, and Mac. The arrival of the iPhone Duo may not be the final chapter in the foldable competition, but the opening scene of the next chapter—one in which smartphones evolve into “workstations in your pocket.”
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