Compare Apple iPhone Duo vs iPhone 18 Pro Max

Apple iPhone Duo

Apple iPhone 18 Pro Max

Battery

Battery
Up to 24 h Typical use; dual built-in batteries; video playback up to 44 h on the outer display, 31 h on the inner
Up to 30 h Typical use, 45 h video playback
Charging
USB-C; up to 50% in around 20 minutes with a 60 W adapter; MagSafe and Qi2 wireless up to 25 W
50% in 15 min USB-C fast charge: up to 50% in around 15 minutes with a 60 W or higher adapter

Fit and build

Display
Inner: 7.6 in Super Retina XDR OLED folding display, 1878 × 2670 at 430 ppi, nano-texture finish. Outer: 5.4 in OLED, 1398 × 2034 at 460 ppi. Both ProMotion up to 120 Hz
6.9 in (175 mm) Super Retina XDR OLED, 2868 × 1320 at 460 ppi
Rear camera
48 MP Dual Fusion system: 48 MP Main 26 mm f/1.6 and 48 MP Ultra Wide 13 mm f/2.2. No dedicated telephoto lens; 2x is an optical-quality crop of the main sensor. 4x optical-quality zoom range
48 MP Pro Fusion camera system; 48 MP Fusion Main camera with variable aperture (f/1.48 to f/4.0), 24 mm
Front camera
Outer: 12 MP Center Stage, f/2.2. Inner: under-display FaceTime camera, f/1.8
18 MP Center Stage camera, f/1.9, autofocus with Focus Pixels
Water resistance
Up to 0.6 ATM (6 m) · IP68 (maximum depth of 6 m up to 30 minutes)
6 m for 30 min · IP68 (maximum depth of 6 m up to 30 minutes)
Sound
Built-in stereo speakers and built-in microphones
Spatial Audio and stereo recording, four studio-quality mics
Unlock
Touch ID fingerprint sensor built into the side button. No Face ID
Face ID, enabled by TrueDepth technology in the Center Stage front camera
Buttons
Volume up/down, Camera Control, Side button with Touch ID; USB-C connector
Volume up/down, Action button, Camera Control, Side button; USB-C connector
Design
Titanium foldable design, Ceramic Shield 2 front, Ceramic Shield back
Aluminum unibody design, Ceramic Shield 2 front, Ceramic Shield back
Memory
Not confirmed
12 GB RAM
Cellular chip
Apple C2 cellular modem
Not confirmed
Video
4K Dolby Vision; inner under-display camera records 1080p at 30 or 60 fps
4K Dolby Vision up to 120 fps (Fusion Main)
Size
Open: 164.6 × 117.8 × 5.2 mm. Closed: 84.1 × 117.8 × 11.3 mm. 254 g
78.0 × 163.4 × 8.75 mm, 249 g
How it folds
Book-style titanium foldable; 7.6 in inner folding OLED with nano-texture finish
Not confirmed

Works with

Connectivity
5G sub-6 and mmWave with 4 × 4 MIMO, Wi-Fi 7, Bluetooth 6, Thread, UWB, NFC; dual eSIM only (not compatible with physical SIM cards)
5G (sub-6 and mmWave), Gigabit LTE, Wi-Fi 7 and Bluetooth 6, with the Apple N1 wireless chip
Software
iOS 27.1
iOS 27

In the box

  • Apple iPhone Duo
  • USB-C charging cable 1 m
  • iPhone 18 Pro Max
  • USB-C charging cable 1 m

Options and ownership

Colors
Night Sky, Star White
Black, Silver, Glacier, Burgundy

Price

List price
From $1,999
From $1,299 (lowest of these two)
Price now
Buy at Apple$1,999
Checked Nov. 15, 2026 · We may earn a commission.
$1,549 Amazon · Checked Nov. 15, 2026 (lowest of these two)

Same on both

Storage
256 GB, 512 GB, 1 TB or 2 TB
Dynamic Island
Yes Dynamic Island, with Always-On display
Processor
A20 Pro: 6-core CPU (2 super cores, 4 efficiency cores), 7-core GPU with Neural Accelerators, Dual 16-core Neural Engine
Availability
Available now
Warranty
1 year Starts the day you buy it
Return window
14 days Starts the day it arrives

Top comparisons

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Top comparisons

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Is now a good time to buy?

  1. Apple iPhone Duo See if now is a good time to buy
  2. iPhone 18 Pro Max See if now is a good time to buy