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iPhone 18 Pro vs iPhone Duo: Here’s every key difference

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Why This Matters

Apple's lineup now splits into two very different flagship paths: a traditional iPhone 18 Pro/Pro Max and the foldable iPhone Duo, forcing buyers to weigh form factor against camera quality. It's Apple's first foldable, and the tradeoffs it makes—heavier than the Pro Max, weaker cameras—mirror the compromises Android foldables have faced for years.

Key Takeaways
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Today Apple unveiled three flagship new iPhone models: iPhone 18 Pro and Pro Max as well as the foldable iPhone Duo. Here’s an overview of the key differences between each model.

Form factor and dimensions: Foldable vs traditional

It’s the most obvious difference, but should be stated regardless. With iPhone Duo you get a very different form factor: it’s a foldable device. With iPhone 18 Pro, you get a traditional iPhone experience.

If you’ve never used a foldable, it’s hard to explain the difference in how each model might feel in practice. But generally speaking, with iPhone Duo you get essentially an iPhone and iPad in one device. The displays are unique shapes and sizes compared to a traditional iPhone though, which may take some adjustment.

Here is how each model’s dimensions compare:

iPhone Duo iPhone 18 Pro iPhone 18 Pro Max Height 4.64 inches (117.8 mm) closed

4.64 inches (117.8 mm) open 5.91 inches (150.0 mm) 6.43 inches (163.4 mm) Width 3.31 inches (84.1 mm) closed

6.48 inches (164.6 mm) open 2.83 inches (71.9 mm) 3.07 inches (78.0 mm) Depth 0.44 inch (11.3 mm) closed

0.21 inch (5.2 mm) open 0.34 inch (8.75 mm) 0.34 inch (8.75 mm) Weight 8.96 ounces (254 grams) 7.44 ounces (211 grams) 8.78 ounces (249 grams)

iPhone Duo might seem more sleek than iPhone 18 Pro Max, but it ultimately weighs slightly more.

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