iPhone Duo vs iPhone X
Quick answer
The iPhone X is 13.2 millimetres0.52 inches narrower and 80 grams2.82 ounces lighter than the iPhone Duo.
The iPhone X is 93.7 millimetres3.69 inches narrower and 80 grams2.82 ounces lighter than the iPhone Duo.
The iPhone X on Amazon (paid link) has stopped receiving iOS updates, so it is stuck on an old version. The iPhone Duo (paid link) runs the newest system and lasts far longer on a single charge. Apple sells the new foldable for $1999, while renewed stock of the older model costs under $150. If you need a phone that works with modern apps, buy the Duo and accept the bulk.
Paid link.
Easier one-handed: iPhone X
Pocket: iPhone X
Weight difference: Noticeable
iPhone DuoiPhone Duo
from $1,999 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)iPhone X
from $999 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)
Paid link.
TRUE SCALE · 1.2 PX/MM
TRUE SCALE · 2.3 PX/MM
Hand: US Army ANSUR II, 2012 (sex-balanced median). Pockets: The Pudding, 2018. Card: ISO/IEC 7810 ID-1.
iPhone Duo: 117.8 by 84.1 by 11.3 millimetres, 254 grams. iPhone X: 143.6 by 70.9 by 7.7 millimetres, 174 grams.iPhone Duo: 117.8 by 164.6 by 5.2 millimetres, 254 grams. iPhone X: 143.6 by 70.9 by 7.7 millimetres, 174 grams.
Duo, X shown at 2.3 pixels per millimetre.
iPhone DuoiPhone Duo
from $1,999 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)iPhone X
from $999 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)
Paid link.
Height: Duo 117.8 millimetres, X 143.6 millimetres.Height: Duo 4.64 inches, X 5.65 inches.Width: Duo 84.1 millimetres, X 70.9 millimetres.Width: Duo 3.31 inches, X 2.79 inches.Depth: Duo 11.30 millimetres, X 7.70 millimetres.Depth: Duo 0.44 inches, X 0.30 inches.Weight: Duo 254 grams, X 174 grams.Weight: Duo 8.96 ounces, X 6.14 ounces.
Height: Duo 117.8 millimetres, X 143.6 millimetres.Height: Duo 4.64 inches, X 5.65 inches.Width: Duo 164.6 millimetres, X 70.9 millimetres.Width: Duo 6.48 inches, X 2.79 inches.Depth: Duo 5.20 millimetres, X 7.70 millimetres.Depth: Duo 0.20 inches, X 0.30 inches.Weight: Duo 254 grams, X 174 grams.Weight: Duo 8.96 ounces, X 6.14 ounces.
Specifications
| Specification | Duo | X |
|---|---|---|
| Height | 117.8 millimetres4.64 inches117.8 millimetres4.64 inches | 143.6 millimetres, 25.8 millimetres more5.65 inches, 1.02 inches more143.6 millimetres, 25.8 millimetres more5.65 inches, 1.02 inches more |
| Height, open | 117.8 millimetres4.64 inches | — |
| Height, closed | 117.8 millimetres4.64 inches | — |
| Width | 84.1 millimetres3.31 inches164.6 millimetres6.48 inches | 70.9 millimetres, 13.2 millimetres less2.79 inches, 0.52 inches less70.9 millimetres, 93.7 millimetres less2.79 inches, 3.69 inches less |
| Width, open | 164.6 millimetres6.48 inches | — |
| Width, closed | 84.1 millimetres3.31 inches | — |
| Depth | 11.30 millimetres0.44 inches5.20 millimetres0.20 inches | 7.70 millimetres, 3.60 millimetres less0.30 inches, 0.14 inches less7.70 millimetres, 2.50 millimetres more0.30 inches, 0.10 inches more |
| Depth, open | 5.20 millimetres0.20 inches | — |
| Depth, closed | 11.30 millimetres0.44 inches | — |
| Weight | 254 grams8.96 ounces254 grams8.96 ounces | 174 grams, 80 grams less6.14 ounces, 2.82 ounces less174 grams, 80 grams less6.14 ounces, 2.82 ounces less |
| Volume | 111.9 cubic centimetres6.83 cubic inches100.8 cubic centimetres6.15 cubic inches | 78.4 cubic centimetres, 33.6 cubic centimetres less4.78 cubic inches, 2.05 cubic inches less78.4 cubic centimetres, 22.4 cubic centimetres less4.78 cubic inches, 1.37 cubic inches less |
| Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure. | 89 percent90 percent | 83 percent, 6 percent less83 percent, 7 percent less |
| Display size — Screen size is always quoted in inches. | 5.4 inches7.6 inches | 5.8 inches, 0.4 inches more5.8 inches, 1.8 inches less |
| Resolution | 1398 × 20341878 × 2670 | 1125 × 24361125 × 2436 |
| Pixel density | 460 pixels per inch430 pixels per inch | 458 pixels per inch, 2 pixels per inch less458 pixels per inch, 28 pixels per inch more |
| Cutout | Dynamic IslandNone | NotchNotch |
| Rear main | 48MP Fusion f/1.648MP Fusion f/1.6 | 12MP12MP |
| Rear ultra-wide | 48MP Ultra Wide f/2.248MP Ultra Wide f/2.2 | —— |
| Rear telephoto | —— | —— |
| Front camera | 12MP Center Stage f/2.2 (outer), under-display FaceTime f/1.8 (inner)12MP Center Stage f/2.2 (outer), under-display FaceTime f/1.8 (inner) | 7MP7MP |
| Chip | A20 ProA20 Pro | A11 BionicA11 Bionic |
| Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity. | 44 hrs31 hrs | 13 hrs13 hrs |
| Port | USB-CUSB-C | LightningLightning |
| Wireless | 5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem | 4G LTE · Wi-Fi · Bluetooth4G LTE · Wi-Fi · Bluetooth |
| Water resistance | IP68 (6m for 30 min)IP68 (6m for 30 min) | IP67 (1m for 30 min)IP67 (1m for 30 min) |
| Storage | 256 GB – 2 TB256 GB – 2 TB | 64 – 256 GB64 – 256 GB |
| Launch price — Base configuration at launch, in US dollars. | 1,999 dollars1,999 dollars | 999 dollars, 1000 dollars less999 dollars, 1000 dollars less |
| Released | Oct 2026Oct 2026 | Nov 2017Nov 2017 |
| Status | CurrentCurrent | LegacyLegacy |
Dimensions
The iPhone X is 25.8 mm (1.02 in) taller, 13.2 mm (0.52 in) narrower, 3.60 mm (0.14 in) thinner and 80 g (2.82 oz) lighter than the iPhone Duo (closed). The iPhone Duo (closed) measures 117.8 × 84.1 × 11.30 mm (4.64 × 3.31 × 0.44 in) and weighs 254 g (8.96 oz). The iPhone Duo (open) measures 117.8 × 164.6 × 5.20 mm (4.64 × 6.48 × 0.20 in) and weighs 254 g (8.96 oz). The iPhone X measures 143.6 × 70.9 × 7.70 mm (5.65 × 2.79 × 0.30 in) and weighs 174 g (6.14 oz).
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Questions about these phones
How do the iPhone Duo and iPhone X compare in size?
The iPhone X is 25.8 mm taller and 13.2 mm narrower than the iPhone Duo closed body. The iPhone Duo is thicker at 11.3 mm compared to 7.7 mm for the iPhone X.
Which phone is lighter?
The iPhone X is 80 g lighter than the iPhone Duo. This weight difference is noticeable when holding both devices.
Which phone has a bigger screen?
The iPhone X has a 5.8 inch display while the iPhone Duo has a 5.4 inch display when closed. The iPhone X screen is slightly larger overall.
Which phone is easier to use one-handed?
The iPhone X is easier to use one-handed than the iPhone Duo. It fits better in the average adult hand due to its narrower width.
Do these phones fit in jeans pockets?
The iPhone X fits in a typical men's jeans pocket but the iPhone Duo does not. Neither phone fits a typical women's jeans pocket.
Is upgrading from the iPhone X to the iPhone Duo worth it?
Whether upgrading from the iPhone X to the iPhone Duo is worth it depends on your needs. The iPhone Duo offers foldable technology but is larger and heavier.