The iPhone Duo forces a change in how the foldable market is discussed, moving the debate from Microsoft’s old Surface Duo to Apple’s longer, if uneven, use of the Duo label. Apple introduced its first foldable smartphone in September, and while the device itself follows established foldable hardware trends, the name has grabbed more attention than the feature set.
Critics online were quick to link the iPhone Duo to Microsoft’s Surface Duo line, which debuted in 2020. Microsoft’s original Surface Duo was a two-screen device running Android with 360-degree rotation capability. Reviewers at the time judged it adequate as a phone and, in one assessment, "pretty bad" as a tablet. A follow-up, the Surface Duo 2, arrived in 2021 but drew similar criticism, described by a reviewer as a "letdown" for its clunky design and software shortcomings. Microsoft ultimately cancelled the Surface Duo 3 project in 2023, leaving that product family discontinued.
That history weakens claims that Apple simply appropriated the Duo name. Apple used Duo decades earlier with the PowerBook Duo, introduced in 1992 and produced through 1997, a compact laptop that could connect to a Duo Dock to serve as a desktop replacement. More recently, Apple registered and marketed the MagSafe Duo Charger in 2020, a wireless charger built to top up two Apple devices at once. Apple also now owns the trademark for iPhone Duo.
The technical comparisons are limited but relevant. Some reviewers praised Microsoft’s Duo hardware for multitasking in split-screen views even as they found other elements wanting. Early hands-on impressions of the iPhone Duo indicate Apple has implemented strong multitasking features in its foldable, suggesting the new device may be judged more favorably than Microsoft’s attempts.
Other brands and services have used Duo in their names, from language apps to calling services, so the term is not unique to any single company. Still, the prominence of Microsoft’s Surface Duo in recent foldable lore made the overlap conspicuous and a subject of online ridicule, even though the product line itself was discontinued years before Apple’s announcement.
What happens next is predictable: the conversation will shift from naming disputes to user experience and sales. With the Surface Duo line shelved and Apple leaning on decades of its own Duo-branded products, the iPhone Duo will carry the name forward into a market where Apple’s execution, rather than nomenclature, will determine success.
