iPhone Duo vs iPhone 8
Quick answer
The iPhone 8 is 16.8 millimetres0.66 inches narrower and 106 grams3.74 ounces lighter than the iPhone Duo.
The iPhone 8 is 97.3 millimetres3.83 inches narrower and 106 grams3.74 ounces lighter than the iPhone Duo.
The iPhone 8 on Amazon (paid link) stopped receiving updates, so it is stuck on its last version. The new iPhone Duo (paid link) is a massive leap, offering a foldable display and a battery that lasts significantly longer. The cost is steep, but only one choice remains current.
Paid link.
Easier one-handed: iPhone 8
Pocket: iPhone 8
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 8
from $699 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 · 2.4 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 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. iPhone 8: 138.4 by 67.3 by 7.3 millimetres, 148 grams.
Duo, 8 shown at 2.4 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 8
from $699 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)
Paid link.
Height: Duo 117.8 millimetres, 8 138.4 millimetres.Height: Duo 4.64 inches, 8 5.45 inches.Width: Duo 84.1 millimetres, 8 67.3 millimetres.Width: Duo 3.31 inches, 8 2.65 inches.Depth: Duo 11.30 millimetres, 8 7.30 millimetres.Depth: Duo 0.44 inches, 8 0.29 inches.Weight: Duo 254 grams, 8 148 grams.Weight: Duo 8.96 ounces, 8 5.22 ounces.
Height: Duo 117.8 millimetres, 8 138.4 millimetres.Height: Duo 4.64 inches, 8 5.45 inches.Width: Duo 164.6 millimetres, 8 67.3 millimetres.Width: Duo 6.48 inches, 8 2.65 inches.Depth: Duo 5.20 millimetres, 8 7.30 millimetres.Depth: Duo 0.20 inches, 8 0.29 inches.Weight: Duo 254 grams, 8 148 grams.Weight: Duo 8.96 ounces, 8 5.22 ounces.
Specifications
| Specification | Duo | 8 |
|---|---|---|
| Height | 117.8 millimetres4.64 inches117.8 millimetres4.64 inches | 138.4 millimetres, 20.6 millimetres more5.45 inches, 0.81 inches more138.4 millimetres, 20.6 millimetres more5.45 inches, 0.81 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 | 67.3 millimetres, 16.8 millimetres less2.65 inches, 0.66 inches less67.3 millimetres, 97.3 millimetres less2.65 inches, 3.83 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 | 7.30 millimetres, 4.00 millimetres less0.29 inches, 0.16 inches less7.30 millimetres, 2.10 millimetres more0.29 inches, 0.08 inches more |
| Depth, open | 5.20 millimetres0.20 inches | — |
| Depth, closed | 11.30 millimetres0.44 inches | — |
| Weight | 254 grams8.96 ounces254 grams8.96 ounces | 148 grams, 106 grams less5.22 ounces, 3.74 ounces less148 grams, 106 grams less5.22 ounces, 3.74 ounces less |
| Volume | 111.9 cubic centimetres6.83 cubic inches100.8 cubic centimetres6.15 cubic inches | 68.0 cubic centimetres, 44.0 cubic centimetres less4.15 cubic inches, 2.68 cubic inches less68.0 cubic centimetres, 32.8 cubic centimetres less4.15 cubic inches, 2.00 cubic inches less |
| Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure. | 89 percent90 percent | 65 percent, 23 percent less65 percent, 25 percent less |
| Display size — Screen size is always quoted in inches. | 5.4 inches7.6 inches | 4.7 inches, 0.7 inches less4.7 inches, 2.9 inches less |
| Resolution | 1398 × 20341878 × 2670 | 750 × 1334750 × 1334 |
| Pixel density | 460 pixels per inch430 pixels per inch | 326 pixels per inch, 134 pixels per inch less326 pixels per inch, 104 pixels per inch less |
| Cutout | Dynamic IslandNone | NoneNone |
| 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 | 699 dollars, 1300 dollars less699 dollars, 1300 dollars less |
| Released | Oct 2026Oct 2026 | Sep 2017Sep 2017 |
| Status | CurrentCurrent | LegacyLegacy |
Dimensions
The iPhone 8 is 20.6 mm (0.81 in) taller, 16.8 mm (0.66 in) narrower, 4.00 mm (0.16 in) thinner and 106 g (3.74 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 8 measures 138.4 × 67.3 × 7.30 mm (5.45 × 2.65 × 0.29 in) and weighs 148 g (5.22 oz).
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Questions about these phones
How do the heights and widths compare?
The iPhone 8 is 20.6 mm taller but 16.8 mm narrower than the iPhone Duo in closed state. This width difference makes the iPhone 8 feel more compact horizontally.
Which phone is lighter?
The iPhone 8 weighs 148 g while the iPhone Duo weighs 254 g, a difference of 106 g. This weight difference is noticeable when holding both phones.
What are the screen sizes?
The iPhone Duo has a 5.4 inch display compared to the 4.7 inch screen on the iPhone 8. The iPhone 8 screen is 0.7 inches smaller than the iPhone Duo.
Which phone is easier to use one-handed?
The iPhone 8 is easier to use one-handed than the iPhone Duo. It is better suited for small hands due to its narrower width.
Do these phones fit in a 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 wider width of the iPhone Duo prevents it from fitting easily.
Is the iPhone Duo a size-only upgrade from the iPhone 8?
The page verdicts state the iPhone Duo is not a size-only upgrade worth it over the iPhone 8. The larger size does not necessarily make it a better choice for everyone.