iPhone 18 Pro Max vs iPhone Duo (folded)
6.1 mm wider, 45.6 mm shorter and 5 g heavier.
Quick answer
Choosing between these devices comes down to vertical reach versus pocket thickness and grip width. iPhone 18 Pro Max measures 163.4 mm tall and 78 mm wide, giving an average adult hand access to a 6.9 in display. iPhone Duo (folded) measures 117.8 mm tall, 84.1 mm wide, and 11.3 mm deep with a 5.4 in screen. iPhone Duo (folded) weighs 254 g, which is heavier than iPhone 18 Pro Max at 249 g. In median men's jeans pockets, iPhone 18 Pro Max fits securely, but iPhone Duo (folded) fails to fit median men's or women's pockets due to its width and depth. iPhone Duo (folded) also costs 1999 USD compared to 1299 USD for iPhone 18 Pro Max.
- iPhone 18 Pro Max fits median men's pockets, while iPhone Duo (folded) does not fit either pocket test.
- iPhone Duo (folded) is thicker at 11.3 mm compared to 8.75 mm for iPhone 18 Pro Max.
- An average adult hand reaches the 5.4 in screen of iPhone Duo (folded) more easily vertically.
- iPhone Duo (folded) weighs 254 g, adding 5 g over the 249 g iPhone 18 Pro Max.
TRUE SCALE · 1.5 PX/MM
TRUE SCALE · 2.1 PX/MM
Hand: US Army ANSUR II, 2012 (sex-balanced median). Pockets: The Pudding, 2018. Card: ISO/IEC 7810 ID-1.
iPhone 18 Pro Max: 163.4 by 78 by 8.75 millimetres, 249 grams. iPhone Duo (folded): 117.8 by 84.1 by 11.3 millimetres, 254 grams.
18 Pro Max, Duo shown at 2.1 pixels per millimetre.
Height: 18 Pro Max 163.4 millimetres, Duo 117.8 millimetres.Height: 18 Pro Max 6.43 inches, Duo 4.64 inches.Width: 18 Pro Max 78.0 millimetres, Duo 84.1 millimetres.Width: 18 Pro Max 3.07 inches, Duo 3.31 inches.Depth: 18 Pro Max 8.75 millimetres, Duo 11.30 millimetres.Depth: 18 Pro Max 0.34 inches, Duo 0.44 inches.Weight: 18 Pro Max 249 grams, Duo 254 grams.Weight: 18 Pro Max 8.78 ounces, Duo 8.96 ounces.
Specifications
| Specification | 18 Pro Max | Duo |
|---|---|---|
| Height | 163.4 millimetres6.43 inches | 117.8 millimetres, 45.6 millimetres less4.64 inches, 1.80 inches less |
| Width | 78.0 millimetres3.07 inches | 84.1 millimetres, 6.1 millimetres more3.31 inches, 0.24 inches more |
| Depth | 8.75 millimetres0.34 inches | 11.30 millimetres, 2.55 millimetres more0.44 inches, 0.10 inches more |
| Weight | 249 grams8.78 ounces | 254 grams, 5 grams more8.96 ounces, 0.18 ounces more |
| Volume | 111.5 cubic centimetres6.81 cubic inches | 111.9 cubic centimetres, 0.4 cubic centimetres more6.83 cubic inches, 0.03 cubic inches more |
| Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure. | 91 percent | 89 percent, 2 percent less |
| Display size — Screen size is always quoted in inches. | 6.9 inches | 5.4 inches, 1.5 inches less |
| Resolution | 1320 × 2868 | 1398 × 2034 |
| Pixel density | 458 pixels per inch | 457 pixels per inch, 1 pixels per inch less |
| Cutout | Dynamic Island | Dynamic Island |
| Rear main | 48MP Fusion, variable aperture f/1.48-f/4.0 | 48MP Fusion f/1.6 |
| Rear ultra-wide | 48MP Fusion f/2.2 | 48MP Ultra Wide f/2.2 |
| Rear telephoto | 48MP Fusion 100mm (4x optical, 8x optical-quality) | — |
| Front camera | 18MP Center Stage f/1.9 | 12MP Center Stage f/2.2 (outer), under-display FaceTime f/1.8 (inner) |
| Chip | A20 Pro | A20 Pro |
| Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity. | 45 hrs | 44 hrs |
| Port | USB-C | USB-C |
| Wireless | 5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem | 5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem |
| Water resistance | IP68 (6m for 30 min) | IP68 (6m for 30 min) |
| Storage | 256 GB – 2 TB | 256 GB – 2 TB |
| Launch price — Base configuration at launch, in US dollars. | 1,299 dollars | 1,999 dollars, 700 dollars more |
| Released | Sep 2026 | Oct 2026 |
| Status | Current | Current |
Also compared with iPhone 18 Pro Max
Questions about these phones
How do the dimensions of iPhone 18 Pro Max compare to iPhone Duo (folded)?
iPhone 18 Pro Max measures 163.4 mm by 78 mm by 8.75 mm, while iPhone Duo (folded) measures 117.8 mm by 84.1 mm by 11.3 mm.
Is iPhone Duo (folded) heavier than iPhone 18 Pro Max?
iPhone Duo (folded) weighs 254 g, which is 5 g heavier than the 249 g iPhone 18 Pro Max.
Which phone has the larger display between iPhone 18 Pro Max and iPhone Duo (folded)?
iPhone 18 Pro Max features a 6.9 in screen, whereas iPhone Duo (folded) offers a 5.4 in exterior display.
Is iPhone Duo (folded) easier to use with one hand than iPhone 18 Pro Max?
iPhone Duo (folded) allows an average adult hand to reach the top edge easily on its 5.4 in screen, but its 84.1 mm width feels wider across the palm than the 78 mm iPhone 18 Pro Max.
Which device fits better in standard jeans pockets?
iPhone 18 Pro Max fits into median men's pockets, whereas iPhone Duo (folded) does not fit median men's or women's pockets.
Is switching to iPhone Duo (folded) worth the price difference over iPhone 18 Pro Max?
iPhone Duo (folded) costs 1999 USD compared to 1299 USD for iPhone 18 Pro Max, offering a compact 117.8 mm height but a thicker 11.3 mm profile.