Apple iPhone Duo: Full Specifications, Features & Review (2026)

Overview

The Apple iPhone Duo is Apple's first foldable iPhone and its most significant change in physical design in years. It combines a 7.6-inch folding Super Retina XDR OLED display with a 5.4-inch outer display, both supporting ProMotion with adaptive refresh rates up to 120Hz. The phone measures just 5.2 mm thick when unfolded and weighs 254 g, while its titanium foldable construction, Ceramic Shield materials, precision hinge, and IP68 rating give it a premium hardware foundation. Apple's A20 Pro chip uses a 6-core CPU, 7-core GPU with Neural Accelerators, and a dual 16-core Neural Engine. The camera system uses dual 48MP Fusion cameras, including a 26mm main camera and 13mm ultrawide, while the main camera also provides a 12MP optical-quality 2x telephoto view. The iPhone Duo also supports Apple Pencil, Touch ID, dual eSIM, USB 3 data transfer, and up to 2TB of storage, making it a productivity-oriented foldable aimed at buyers willing to pay a significant premium for Apple's first-generation foldable design.

Key Highlights

• 7.6-inch foldable display: The inner Super Retina XDR OLED panel supports ProMotion up to 120Hz, HDR, up to 3000 nits outdoor peak brightness, and a nano-texture finish. The 5.4-inch outer display provides a conventional phone-sized experience when folded.
• A20 Pro and dual 48MP camera system: Apple uses its A20 Pro chip with a 6-core CPU and 7-core GPU, while the rear camera system combines a 48MP Fusion Main and 48MP Fusion Ultra Wide with a 12MP optical-quality 2x telephoto view.
• Ultra-premium foldable hardware: The 254g chassis uses grade 5 titanium, Ceramic Shield materials, a precision hinge, dual batteries, IP68 protection, Touch ID, Apple Pencil support, and 25W MagSafe/Qi2 wireless charging.

Price in US

The iPhone Duo starts at $1,999 in the United States with 256GB of storage. The 512GB model is listed at $2,199, the 1TB version at $2,599, and the 2TB configuration reaches $3,199. The pricing places Apple's foldable firmly in the ultra-premium flagship category. Buyers are paying not only for the A20 Pro platform and large OLED display but also for Apple's first foldable hardware design, titanium construction, specialized hinge, and dual-display experience. The $1,999 entry price is therefore a major part of the buying decision rather than a minor specification detail.

Our Take

The iPhone Duo is best viewed as a first-generation Apple foldable designed for users who value the iOS ecosystem, large-screen multitasking, premium materials, and the convenience of having a tablet-like display inside a phone-sized device. Its camera system is capable and includes two 48MP rear cameras, but the hardware is less photography-focused than Apple's Pro Max models because there is no dedicated long-range telephoto camera. The stronger reasons to buy the Duo are its two-screen design, A20 Pro performance, Apple Pencil support, thin 5.2mm unfolded profile, and software optimized for foldable use. At $1,999, it is not a value-oriented flagship. For buyers specifically seeking an Apple foldable and willing to pay for its new form factor, it is a compelling first step. For buyers primarily interested in cameras or conventional flagship value, Apple's traditional iPhone Pro lineup remains the more straightforward choice.