Apple has brought a familiar name into a new hardware era. In early September 2026, the company announced its first foldable smartphone, the iPhone Duo, reviving a name connected to Apple’s history while placing it beside Microsoft’s Surface Duo family.
That creates an unusual technology story: two companies have used the Duo name for different devices, and Apple has used it across different product categories. The name reaches back to the PowerBook Duo, appears in the MagSafe Duo Charger, and now belongs to Apple’s first foldable smartphone.
Apple’s Duo Name Has Been Around for Decades
Apple introduced the PowerBook Duo in 1992, giving the company an early product built around the idea of two roles in one compact device. The PowerBook Duo was compact and lightweight, yet it could connect to the Duo Dock to become a desktop.
That product was produced through 1997, creating a long-running chapter in Apple’s Duo history. The PowerBook Duo was not a foldable smartphone, but its name carried an idea of flexibility: one device could serve a mobile role and then connect with hardware for a desktop experience.
Apple’s trademark list also includes the MagSafe Duo Charger, introduced in 2020. That name added another use for Duo, this time for a charger rather than a computer or smartphone.
Now Apple owns the trademark for iPhone Duo, linking the name to a foldable smartphone for the first time in the company’s product history. The announcement in early September 2026 turns an old Apple name into part of a new phone category for the company.
Microsoft Took the Duo Name in Another Direction
Microsoft launched the Surface Duo in 2020, using the same two-word name for a different device family. Microsoft launched Surface Duo 2 in 2021, extending that line with a second generation.
The shared name can make the products sound connected, but the companies behind them are different. Apple manufactures the iPhone Duo, while Microsoft manufactured the Surface Duo and Surface Duo 2.
The timelines also tell separate stories. Apple introduced the PowerBook Duo in 1992 and produced it through 1997, then introduced the MagSafe Duo Charger in 2020 before announcing the iPhone Duo in early September 2026. Microsoft launched the Surface Duo in 2020 and Surface Duo 2 in 2021, then scrapped the Surface Duo 3 in 2023.
That final chapter gives the name a different history at Microsoft. The Surface Duo family reached a second generation, but Microsoft scrapped Surface Duo 3 in 2023. Apple’s iPhone Duo arrives after that decision, carrying the same name into a new product announcement.
One Name, Several Product Ideas
What makes the iPhone Duo announcement stand out is not only the foldable smartphone itself, but the way the name gathers several Apple products across time. The PowerBook Duo connected a portable computer to a desktop through the Duo Dock. The MagSafe Duo Charger brought two charging functions into one product name. The iPhone Duo now marks Apple’s entry into foldable smartphones.
Those products share a name, but the verified details show distinct roles. The PowerBook Duo was a compact, lightweight computer. The MagSafe Duo Charger was introduced in 2020. The iPhone Duo is Apple’s first foldable smartphone, announced in early September 2026.
Microsoft’s use of Duo adds another layer to the story because the Surface Duo and Surface Duo 2 belong to a separate product history. Microsoft launched the first model in 2020, followed it with Surface Duo 2 in 2021, and scrapped Surface Duo 3 in 2023.
Apple’s ownership of the iPhone Duo trademark gives the new announcement a clear identity, even though Duo has appeared in technology products from both companies. The name has crossed laptops, chargers, and smartphones, yet each use reflects a different moment in hardware history.
The Foldable Chapter Begins
As of September 27, 2026, Apple’s iPhone Duo stands at the newest point in that timeline. The company has moved from the PowerBook Duo of 1992 to a foldable smartphone carrying the same central name, while Microsoft’s Surface Duo story ended after the decision to scrap Surface Duo 3 in 2023.
That contrast makes the iPhone Duo more than a new product name. It is Apple’s first foldable smartphone and the latest step in a Duo naming history that spans the PowerBook Duo, the MagSafe Duo Charger, and now the iPhone.
The next chapter will show how Apple’s foldable smartphone shapes the meaning of Duo for the company. For now, one name connects a 1992 computer, a 2020 charger, Microsoft’s 2020 and 2021 smartphones, and Apple’s first foldable phone announced in 2026.
