iPhone Duo review

iPhone Duo is Apple's foldable, and Apple calls its inner screen the largest display of any iPhone. The spec page lists a 7.6-inch Super Retina XDR folding OLED with a nano-texture finish inside and a 5.4-inch OLED outside, both with ProMotion up to 120Hz, plus the A20 Pro chip used in the iPhone 18 Pro. It is 5.2 mm thin open and 11.3 mm closed, and weighs 254 g. The rear has a 48MP Fusion Main and a 48MP Fusion Ultra Wide, with a 12MP optical-quality 2x option, but no dedicated telephoto. Unlocking uses Touch ID in the side button rather than Face ID. Apple rates battery life at up to 44 hours of video playback on the outer display and up to 31 hours on the inner one, with up to 50% charge in around 20 minutes on a 60W-capable adapter. At $1,999 for 256GB it costs $800 more than the iPhone 18 Pro. We compared documented features and published prices only.

Who it is for

early adopters who want a tablet-size screen in a phone

Price

From $1,999 for 256GB.

The largest display of any iPhone. Foldable. Posable. And durable. From $1999
Quoted from the vendor pricing page on November 14, 2026.

Key features

• 7.6-inch folding OLED inner display with a nano-texture finish
• 5.4-inch outer OLED display
• A20 Pro chip
• 48MP Fusion Main and 48MP Fusion Ultra Wide cameras
• Touch ID in the side button and up to 44 hours of video playback on the outer display

Strengths and weaknesses

• Strength: Largest display of any iPhone, per Apple
• Strength: 5.2 mm thin when open
• Strength: Storage from 256GB to 2TB
• Weakness: Most expensive iPhone here at $1,999
• Weakness: 254 g and 11.3 mm thick when closed
• Weakness: No dedicated telephoto camera and Touch ID instead of Face ID

Key facts

• Price checked: $1,999
• Display: 7.6 inch inner, 5.4 inch outer
• Chip: A20 Pro
• Video playback: Up to 44 hours (outer display)
• Storage: 256GB to 2TB

Where it ranks

iPhone Duo is No. 8 in our Best iPhones verdict.