iPhone Duo (folded) vs iPhone 18 Pro Max
6.1 mm narrower, 45.6 mm taller and 5 g lighter.
Quick answer
Choosing between iPhone Duo (folded) and iPhone 18 Pro Max comes down to proportions. iPhone Duo (folded) is short at 117.8 mm, but wide at 84.1 mm and thick at 11.3 mm. In contrast, iPhone 18 Pro Max measures 163.4 mm tall, 78 mm wide, and 8.75 mm deep. At 254 g, iPhone Duo (folded) is slightly heavier than the 249 g iPhone 18 Pro Max. In median pockets, iPhone Duo (folded) does not fit men's or women's jeans pockets, whereas iPhone 18 Pro Max fits men's pockets. The 5.4 in screen of iPhone Duo (folded) limits vertical reach, but the 84.1 mm width challenges an average adult hand. iPhone 18 Pro Max delivers an expansive 6.9 in display for reading.
- iPhone Duo (folded) is 11.3 mm thick, creating more bulge than the 8.75 mm iPhone 18 Pro Max.
- iPhone 18 Pro Max fits median men's pockets, while iPhone Duo (folded) fails both jeans pockets.
- At 84.1 mm wide, iPhone Duo (folded) feels wider across an average adult hand.
- iPhone 18 Pro Max offers a much larger 6.9 in screen for reading and media.
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 Duo (folded): 117.8 by 84.1 by 11.3 millimetres, 254 grams. iPhone 18 Pro Max: 163.4 by 78 by 8.75 millimetres, 249 grams.
Duo, 18 Pro Max shown at 2.1 pixels per millimetre.
Height: Duo 117.8 millimetres, 18 Pro Max 163.4 millimetres.Height: Duo 4.64 inches, 18 Pro Max 6.43 inches.Width: Duo 84.1 millimetres, 18 Pro Max 78.0 millimetres.Width: Duo 3.31 inches, 18 Pro Max 3.07 inches.Depth: Duo 11.30 millimetres, 18 Pro Max 8.75 millimetres.Depth: Duo 0.44 inches, 18 Pro Max 0.34 inches.Weight: Duo 254 grams, 18 Pro Max 249 grams.Weight: Duo 8.96 ounces, 18 Pro Max 8.78 ounces.
Specifications
| Specification | Duo | 18 Pro Max |
|---|---|---|
| Height | 117.8 millimetres4.64 inches | 163.4 millimetres, 45.6 millimetres more6.43 inches, 1.80 inches more |
| Width | 84.1 millimetres3.31 inches | 78.0 millimetres, 6.1 millimetres less3.07 inches, 0.24 inches less |
| Depth | 11.30 millimetres0.44 inches | 8.75 millimetres, 2.55 millimetres less0.34 inches, 0.10 inches less |
| Weight | 254 grams8.96 ounces | 249 grams, 5 grams less8.78 ounces, 0.18 ounces less |
| Volume | 111.9 cubic centimetres6.83 cubic inches | 111.5 cubic centimetres, 0.4 cubic centimetres less6.81 cubic inches, 0.03 cubic inches less |
| Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure. | 89 percent | 91 percent, 2 percent more |
| Display size — Screen size is always quoted in inches. | 5.4 inches | 6.9 inches, 1.5 inches more |
| Resolution | 1398 × 2034 | 1320 × 2868 |
| Pixel density | 457 pixels per inch | 458 pixels per inch, 1 pixels per inch more |
| Cutout | Dynamic Island | Dynamic Island |
| Rear main | 48MP Fusion f/1.6 | 48MP Fusion, variable aperture f/1.48-f/4.0 |
| Rear ultra-wide | 48MP Ultra Wide f/2.2 | 48MP Fusion f/2.2 |
| Rear telephoto | — | 48MP Fusion 100mm (4x optical, 8x optical-quality) |
| Front camera | 12MP Center Stage f/2.2 (outer), under-display FaceTime f/1.8 (inner) | 18MP Center Stage f/1.9 |
| Chip | A20 Pro | A20 Pro |
| Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity. | 44 hrs | 45 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. | 1,999 dollars | 1,299 dollars, 700 dollars less |
| Released | Oct 2026 | Sep 2026 |
| Status | Current | Current |
Also compared with iPhone Duo (folded)
Questions about these phones
How do the dimensions of iPhone Duo (folded) compare to iPhone 18 Pro Max?
iPhone Duo (folded) is 117.8 mm tall, 84.1 mm wide, and 11.3 mm deep. iPhone 18 Pro Max is 163.4 mm tall, 78 mm wide, and 8.75 mm deep.
Is iPhone Duo (folded) heavier than iPhone 18 Pro Max?
iPhone Duo (folded) weighs 254 g, which is heavier than iPhone 18 Pro Max at 249 g.
Which phone has a larger screen between iPhone Duo (folded) and iPhone 18 Pro Max?
iPhone 18 Pro Max has a 6.9 in display, whereas iPhone Duo (folded) has a 5.4 in exterior display.
Is iPhone Duo (folded) easier for one-handed use than iPhone 18 Pro Max?
iPhone Duo (folded) is shorter to reach vertically, but the 84.1 mm width is harder for an average adult hand to wrap around than the 78 mm iPhone 18 Pro Max.
Will iPhone Duo (folded) or iPhone 18 Pro Max fit in jeans pockets?
iPhone 18 Pro Max fits in median men's pockets but not women's pockets. iPhone Duo (folded) does not fit median men's or women's pockets due to width and depth.
Is upgrading to iPhone Duo (folded) from iPhone 18 Pro Max worth it for size alone?
iPhone Duo (folded) is much shorter at 117.8 mm, but iPhone Duo (folded) is thicker at 11.3 mm and costs 1999 USD compared to 1299 USD for iPhone 18 Pro Max.