Apple iPhone Duo review: specs, battery & used prices

Summary

The Apple iPhone Duo is a 2026 foldable flagship on the Apple A20 Pro, carrying a 7.6-inch 120 Hz OLED rated at 3000 nits, a 5400 mAh battery, and an IP68 body at 254 grams. Our catalog scores it 97 on everyday use, 91 on screen and 49 on compactness, with the 12/256 GB trim listed new near $1999. A dual 48-megapixel camera system with optical stabilization records 4K120 video, and our records grant seven years of platform runway. The Apple iPhone 17 Pro Max is the slab flagship of the same generation, and the Apple iPhone Air is the thin large-screen alternative.

Display and design

The 7.6-inch OLED refreshes at 120 Hz with a 3000-nit peak, and our screen axis of 91 places it at the top of the catalog for brightness and motion together. At 254 grams with an IP68 seal, the folding form factor trades pocketability for canvas: our compactness score of 49 is the honest cost of the big internal panel. Charging figures are not tracked in our records for this model.

Performance

The A20 Pro earns an everyday axis of 97 and a gaming axis of 85 in our model, placing it among the strongest platforms in our records, with headroom for demanding games and heavy creative apps on the large internal display. Tracked trims carry 12 GB of memory across storage tiers up to 2 TB. Seven years of platform runway in our records make it a long-horizon purchase.

Camera

A dual 48-megapixel camera system with optical stabilization covers main and ultrawide duties, recording up to 4K120, in the video-first tradition of the platform. The camera axis of 39 in our model is mid-band: it inherits the main-sensor quality of the slab flagships, while the two-lens layout leaves zoom reach to software cropping compared with the triple-camera Pro models.

Battery and charging

The 5400 mAh battery scores 48 on our battery axis, a full day of folding-screen use that holds up better than early foldables managed, helped by the platform's efficiency. Our records do not track a charging figure or charging axis for this model, so refill expectations should be verified at purchase. The cell is sized for the large internal panel it feeds.

Verdict

The iPhone Duo is Apple's first book-style foldable in our catalog: a 7.6-inch 3000-nit panel, the A20 Pro platform and a dual 48-megapixel camera at $1999 new for the entry trim. The compactness score of 49 and the untracked charging data are the open questions of the form factor. For buyers who want the canvas of a tablet in a phone and seven years of runway, it is the definitive 2026 foldable option, with the iPhone 17 Pro Max as the slab alternative.