iPhone 8 vs iPhone Duo
Quick answer
The iPhone Duo is 16.8 millimetres0.66 inches wider and 106 grams3.74 ounces heavier than the iPhone 8.
The iPhone Duo is 97.3 millimetres3.83 inches wider and 106 grams3.74 ounces heavier than the iPhone 8.
The iPhone 8 on Amazon (paid link) has stopped receiving updates and is stuck on its last version, while the Duo (paid link) runs the current system with years of support left. Performance feels like a generational leap from the old chip to the flagship silicon inside the foldable Duo, which also lasts noticeably longer between charges. Buy a renewed 8 for nearly nothing, or pay full price for the Duo since it just launched.
Paid link.
Easier one-handed: iPhone 8
Pocket: iPhone 8
Weight difference: Noticeable
iPhone 8
from $699 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)iPhone DuoiPhone Duo
from $1,999 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)
Paid link.
TRUE SCALE · 1.2 PX/MM
TRUE SCALE · 2.4 PX/MM
Hand: US Army ANSUR II, 2012 (sex-balanced median). Pockets: The Pudding, 2018. Card: ISO/IEC 7810 ID-1.
iPhone 8: 138.4 by 67.3 by 7.3 millimetres, 148 grams. iPhone Duo: 117.8 by 84.1 by 11.3 millimetres, 254 grams.iPhone 8: 138.4 by 67.3 by 7.3 millimetres, 148 grams. iPhone Duo: 117.8 by 164.6 by 5.2 millimetres, 254 grams.
8, Duo shown at 2.4 pixels per millimetre.
iPhone 8
from $699 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)iPhone DuoiPhone Duo
from $1,999 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)
Paid link.
Height: 8 138.4 millimetres, Duo 117.8 millimetres.Height: 8 5.45 inches, Duo 4.64 inches.Width: 8 67.3 millimetres, Duo 84.1 millimetres.Width: 8 2.65 inches, Duo 3.31 inches.Depth: 8 7.30 millimetres, Duo 11.30 millimetres.Depth: 8 0.29 inches, Duo 0.44 inches.Weight: 8 148 grams, Duo 254 grams.Weight: 8 5.22 ounces, Duo 8.96 ounces.
Height: 8 138.4 millimetres, Duo 117.8 millimetres.Height: 8 5.45 inches, Duo 4.64 inches.Width: 8 67.3 millimetres, Duo 164.6 millimetres.Width: 8 2.65 inches, Duo 6.48 inches.Depth: 8 7.30 millimetres, Duo 5.20 millimetres.Depth: 8 0.29 inches, Duo 0.20 inches.Weight: 8 148 grams, Duo 254 grams.Weight: 8 5.22 ounces, Duo 8.96 ounces.
Specifications
| Specification | 8 | Duo |
|---|---|---|
| Height | 138.4 millimetres5.45 inches138.4 millimetres5.45 inches | 117.8 millimetres, 20.6 millimetres less4.64 inches, 0.81 inches less117.8 millimetres, 20.6 millimetres less4.64 inches, 0.81 inches less |
| Height, open | — | 117.8 millimetres4.64 inches |
| Height, closed | — | 117.8 millimetres4.64 inches |
| Width | 67.3 millimetres2.65 inches67.3 millimetres2.65 inches | 84.1 millimetres, 16.8 millimetres more3.31 inches, 0.66 inches more164.6 millimetres, 97.3 millimetres more6.48 inches, 3.83 inches more |
| Width, open | — | 164.6 millimetres6.48 inches |
| Width, closed | — | 84.1 millimetres3.31 inches |
| Depth | 7.30 millimetres0.29 inches7.30 millimetres0.29 inches | 11.30 millimetres, 4.00 millimetres more0.44 inches, 0.16 inches more5.20 millimetres, 2.10 millimetres less0.20 inches, 0.08 inches less |
| Depth, open | — | 5.20 millimetres0.20 inches |
| Depth, closed | — | 11.30 millimetres0.44 inches |
| Weight | 148 grams5.22 ounces148 grams5.22 ounces | 254 grams, 106 grams more8.96 ounces, 3.74 ounces more254 grams, 106 grams more8.96 ounces, 3.74 ounces more |
| Volume | 68.0 cubic centimetres4.15 cubic inches68.0 cubic centimetres4.15 cubic inches | 111.9 cubic centimetres, 44.0 cubic centimetres more6.83 cubic inches, 2.68 cubic inches more100.8 cubic centimetres, 32.8 cubic centimetres more6.15 cubic inches, 2.00 cubic inches more |
| Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure. | 65 percent65 percent | 89 percent, 23 percent more90 percent, 25 percent more |
| Display size — Screen size is always quoted in inches. | 4.7 inches4.7 inches | 5.4 inches, 0.7 inches more7.6 inches, 2.9 inches more |
| Resolution | 750 × 1334750 × 1334 | 1398 × 20341878 × 2670 |
| Pixel density | 326 pixels per inch326 pixels per inch | 460 pixels per inch, 134 pixels per inch more430 pixels per inch, 104 pixels per inch more |
| Cutout | NoneNone | Dynamic IslandNone |
| Rear main | 12MP12MP | 48MP Fusion f/1.648MP Fusion f/1.6 |
| Rear ultra-wide | —— | 48MP Ultra Wide f/2.248MP Ultra Wide f/2.2 |
| Rear telephoto | —— | —— |
| Front camera | 7MP7MP | 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) |
| Chip | A11 BionicA11 Bionic | A20 ProA20 Pro |
| Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity. | 13 hrs13 hrs | 44 hrs31 hrs |
| Port | LightningLightning | USB-CUSB-C |
| Wireless | 4G LTE · Wi-Fi · Bluetooth4G LTE · Wi-Fi · Bluetooth | 5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem |
| Water resistance | IP67 (1m for 30 min)IP67 (1m for 30 min) | IP68 (6m for 30 min)IP68 (6m for 30 min) |
| Storage | 64 – 256 GB64 – 256 GB | 256 GB – 2 TB256 GB – 2 TB |
| Launch price — Base configuration at launch, in US dollars. | 699 dollars699 dollars | 1,999 dollars, 1300 dollars more1,999 dollars, 1300 dollars more |
| Released | Sep 2017Sep 2017 | Oct 2026Oct 2026 |
| Status | LegacyLegacy | CurrentCurrent |
Dimensions
The iPhone Duo (closed) is 20.6 mm (0.81 in) shorter, 16.8 mm (0.66 in) wider, 4.00 mm (0.16 in) thicker and 106 g (3.74 oz) heavier than the iPhone 8. The iPhone 8 measures 138.4 × 67.3 × 7.30 mm (5.45 × 2.65 × 0.29 in) and weighs 148 g (5.22 oz). 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).
Also compared with iPhone 8
Questions about these phones
How much bigger is the iPhone Duo than the iPhone 8?
The iPhone Duo is 20.6 mm shorter but 16.8 mm wider than the iPhone 8 when closed. It also has a slightly larger 5.4 inch screen compared to the iPhone 8's 4.7 inch display.
Is the iPhone Duo heavier than the iPhone 8?
Yes, the iPhone Duo weighs 254 g while the iPhone 8 weighs 148 g, making the difference noticeable. The iPhone Duo is 106 g heavier than the iPhone 8.
Which phone has a bigger screen?
The iPhone Duo has a 5.4 inch display which is 0.7 inches larger than the iPhone 8's 4.7 inch screen. This gives the iPhone Duo more viewing area despite being shorter in height.
Which phone is easier to use with one hand?
The iPhone 8 is easier to use with one hand than the iPhone Duo. The iPhone 8 is narrower and lighter, making it better for small hands.
Will either phone fit in a jeans pocket?
The iPhone 8 fits in a typical men's jeans pocket but the iPhone Duo does not fit in men's or women's pockets. The iPhone Duo is wider and thicker which prevents it from sliding in easily.
Is the size upgrade worth it?
Whether the size upgrade is worth it depends on your priorities for screen area versus portability. The iPhone 8 remains more pocketable while the iPhone Duo offers a larger display when closed.