John Ternus’s comments about the iPhone Duo came into public focus on September 21, 2026, offering the clearest look yet at Apple’s thinking behind its foldable iPhone. The design was built around an unfolded large-screen experience inspired by the iPad, while the development work centered on the hinge, display and reliability. Ternus also presented his leadership as continuity for Apple, not a radical strategic reset.
What John Ternus said about the iPhone Duo
Ternus said Apple did not want to create a square display by simply joining two conventional phone shapes. Instead, the company aimed for a large-screen experience that felt natural when the device was unfolded, drawing on the design logic Apple has developed through the iPad.
That decision also led Apple to develop a new aspect ratio for the iPhone Duo. In practical terms, the company treated the foldable as a different kind of iPhone rather than a conventional handset with an extra screen attached. It is a subtle distinction on paper, but it is the entire product philosophy in one sentence.
Why Apple chose an iPad-like unfolded screen
The iPad reference explains why Apple’s approach is not simply about making a phone larger. Ternus described the goal as an experience that feels right across the expanded display, rather than a square workspace created by putting two phone-shaped panels together.
The distinction matters because a foldable phone has to serve two moments: the compact form used in one hand and the larger canvas revealed when it opens. Ternus’s explanation focuses on the second moment. Apple wanted the unfolded format to behave like a coherent large-screen device, with a shape informed by the iPad.
He also highlighted a small but deliberate piece of software polish: an opening animation that travels across the device as it unfolds. Ternus described it as playful and designed to bring a smile to the user. It is the kind of detail Apple uses to make hardware and software feel like one product.
The hinge, display and reliability were the hard problems
Ternus said the iPhone Duo’s development involved many problems, specifically identifying the hinge, display and reliability as areas Apple had to address.
Those three areas define the basic engineering challenge of any foldable device. The hinge controls how the phone opens and closes. The display has to support a changing physical shape while remaining part of a usable touch surface. Reliability determines whether the design can withstand the demands of daily use over time.
Ternus’s comments explain where Apple concentrated its work, but they do not turn the iPhone Duo into a durability promise. The product’s public positioning rests on the design experience Apple wanted to create and the engineering problems it says it worked through.
Siri is not designed to replace human relationships
Ternus also addressed Siri’s role in Apple’s AI strategy. He said Siri AI is not designed to be a friend, and that Apple does not want it to replace human relationships.
His explanation places Siri in a practical role rather than presenting it as an artificial companion. Ternus said human relationships are how people learn, grow and find joy, drawing a clear line between an assistant that helps with tasks and a person who provides emotional connection.
That distinction is especially relevant as technology companies increasingly describe assistants in more personal terms. Apple’s position, as described by Ternus, is that Siri should remain a tool within the product experience rather than imitate a friend.
Ternus presents Apple’s leadership as continuity
John Ternus became Apple CEO on September 1, 2026, succeeding Tim Cook, who became executive chairman. Apple’s official biography says Ternus joined its product design team in 2001, later became a vice president of Hardware Engineering and then senior vice president of Hardware Engineering. He also holds a bachelor’s degree in Mechanical Engineering from the University of Pennsylvania.
When asked about the direction of Apple under his leadership, Ternus rejected the idea of a radical change. He said the company’s focus on innovation, products and customers had not changed, and described himself as passionate about building products with Apple’s teams.
That does not mean the company’s product roadmap will remain identical. It means Ternus is describing the leadership transition as an extension of Apple’s existing priorities rather than a break with them. The iPhone Duo fits that message: it introduces a new form factor, but Ternus presents its development as the result of Apple applying its established product standards to a different kind of device.
How the iPhone Duo differs from the iPhone 18 Pro
In a separate interview, Ternus positioned the iPhone Duo and iPhone 18 Pro as products for different priorities. The Duo is associated with a larger-screen experience in a foldable design, while the iPhone 18 Pro is associated with peak performance and camera capabilities.
| Model | Primary experience | Associated priority |
| iPhone Duo | Large-screen experience in a foldable design | Expanded display experience |
| iPhone 18 Pro | Conventional iPhone experience | Performance and camera capabilities |
The comparison is about product positioning, not a performance ranking. Ternus’s message is that the two models occupy different roles within the iPhone range, much as Apple’s notebook lineup separates the MacBook Air from the MacBook Pro.
Apple’s foldable strategy therefore begins with a design choice: make the unfolded phone feel like a large-screen product in its own right. Ternus’s broader message is just as clear—under his leadership, Apple intends to pursue that kind of product development without declaring a radical change in what the company values.
