iPhone Duo vs iPhone 18 Pro Max: which should you choose?
The Duo opens into a larger display. The 18 Pro Max keeps a conventional phone shape and a dedicated telephoto camera. Both use A20 Pro, so the more useful comparison is how you read, multitask and take photos.
| Feature | iPhone Duo | iPhone 18 Pro Max |
|---|---|---|
| Display | 7.6-inch inner, 5.4-inch outer | 6.9-inch |
| Weight | 254g | 249g |
| Thickness | 11.3mm folded, 5.2mm unfolded | 8.75mm |
| Design | Foldable | Conventional phone |
| Cameras | 48MP main and ultrawide | 48MP main, ultrawide and telephoto |
Checked 13 September 2026. Prices may change; confirm the current price at the local Apple Store before purchasing.
Official Apple specifications: iPhone Duo, iPhone 18 Pro Max
Choose for the way you use your phone
Consider the Duo if you frequently read long documents, view maps or use apps side by side. Consider Pro Max if distant subjects and a familiar phone shape matter more. The Duo is thicker when folded; try holding and unfolding it in a store before deciding. This is buying advice based on specifications, not a hands-on review.
US prices compared at the same storage capacity (USD)
| Storage | iPhone Duo | iPhone 18 Pro Max | Duo price premium |
|---|---|---|---|
| 256GB | $1,999 | $1,299 | +$700 |
| 512GB | $2,199 | $1,499 | +$700 |
| 1TB | $2,599 | $1,899 | +$700 |
| 2TB | $3,199 | $2,499 | +$700 |
Apple US full purchase prices, before trade-in or carrier promotions. Checkout tax depends on location. Checked 13 September 2026.
Is iPhone Duo the foldable iPhone?
Yes. The foldable iPhone discussed here is iPhone Duo. Searches sometimes call it “iPhone 18 Duo”; check the iPhone Duo product name and storage capacity on Apple’s store when buying.
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