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iPhone 17 vs iPhone Duo

Quick answer

The iPhone Duo is 31.8 millimetres1.25 inches shorter and 77 grams2.72 ounces heavier than the iPhone 17.

The iPhone Duo is 93.1 millimetres3.67 inches wider and 77 grams2.72 ounces heavier than the iPhone 17.

The iPhone 17 on Amazon (paid link) remains the sensible daily driver, offering a narrow, light body that vanishes into your pocket. The iPhone Duo (paid link) is a just released foldable with significantly better battery life, but at a premium price and much heavier, it’s a luxury tool rather than a universal upgrade. If you need endurance and don’t mind the extra girth, it’s tempting; otherwise, the 17 is the easier choice.

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Easier one-handediPhone 17

PocketiPhone 17

Weight differenceNoticeable

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HeightWidthDepthWeight17149.6 millimetres5.89 inches71.5 millimetres2.81 inches7.95 millimetres0.31 inches177 grams6.24 ouncesDuo117.8 millimetres, 31.8 millimetres less4.64 inches, 1.25 inches less84.1 millimetres, 12.6 millimetres more3.31 inches, 0.50 inches more11.30 millimetres, 3.35 millimetres more0.44 inches, 0.13 inches more254 grams, 77 grams more8.96 ounces, 2.72 ounces more

Height: 17 149.6 millimetres, Duo 117.8 millimetres.Height: 17 5.89 inches, Duo 4.64 inches.Width: 17 71.5 millimetres, Duo 84.1 millimetres.Width: 17 2.81 inches, Duo 3.31 inches.Depth: 17 7.95 millimetres, Duo 11.30 millimetres.Depth: 17 0.31 inches, Duo 0.44 inches.Weight: 17 177 grams, Duo 254 grams.Weight: 17 6.24 ounces, Duo 8.96 ounces.

HeightWidthDepthWeight17149.6 millimetres5.89 inches71.5 millimetres2.81 inches7.95 millimetres0.31 inches177 grams6.24 ouncesDuo117.8 millimetres, 31.8 millimetres less4.64 inches, 1.25 inches less164.6 millimetres, 93.1 millimetres more6.48 inches, 3.67 inches more5.20 millimetres, 2.75 millimetres less0.20 inches, 0.11 inches less254 grams, 77 grams more8.96 ounces, 2.72 ounces more

Height: 17 149.6 millimetres, Duo 117.8 millimetres.Height: 17 5.89 inches, Duo 4.64 inches.Width: 17 71.5 millimetres, Duo 164.6 millimetres.Width: 17 2.81 inches, Duo 6.48 inches.Depth: 17 7.95 millimetres, Duo 5.20 millimetres.Depth: 17 0.31 inches, Duo 0.20 inches.Weight: 17 177 grams, Duo 254 grams.Weight: 17 6.24 ounces, Duo 8.96 ounces.

Specifications

Specifications for iPhone 17, iPhone Duo. Differences are given against iPhone 17.
Specification17Duo
Height149.6 millimetres5.89 inches149.6 millimetres5.89 inches117.8 millimetres, 31.8 millimetres less4.64 inches, 1.25 inches less117.8 millimetres, 31.8 millimetres less4.64 inches, 1.25 inches less
Height, open—117.8 millimetres4.64 inches
Height, closed—117.8 millimetres4.64 inches
Width71.5 millimetres2.81 inches71.5 millimetres2.81 inches84.1 millimetres, 12.6 millimetres more3.31 inches, 0.50 inches more164.6 millimetres, 93.1 millimetres more6.48 inches, 3.67 inches more
Width, open—164.6 millimetres6.48 inches
Width, closed—84.1 millimetres3.31 inches
Depth7.95 millimetres0.31 inches7.95 millimetres0.31 inches11.30 millimetres, 3.35 millimetres more0.44 inches, 0.13 inches more5.20 millimetres, 2.75 millimetres less0.20 inches, 0.11 inches less
Depth, open—5.20 millimetres0.20 inches
Depth, closed—11.30 millimetres0.44 inches
Weight177 grams6.24 ounces177 grams6.24 ounces254 grams, 77 grams more8.96 ounces, 2.72 ounces more254 grams, 77 grams more8.96 ounces, 2.72 ounces more
Volume85.0 cubic centimetres5.19 cubic inches85.0 cubic centimetres5.19 cubic inches111.9 cubic centimetres, 26.9 cubic centimetres more6.83 cubic inches, 1.64 cubic inches more100.8 cubic centimetres, 15.8 cubic centimetres more6.15 cubic inches, 0.96 cubic inches more
Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure.90 percent90 percent89 percent, 1 percent less90 percent, the same
Display size — Screen size is always quoted in inches.6.3 inches6.3 inches5.4 inches, 0.9 inches less7.6 inches, 1.3 inches more
Resolution1206 × 26221206 × 26221398 × 20341878 × 2670
Pixel density460 pixels per inch460 pixels per inch460 pixels per inch, the same430 pixels per inch, 30 pixels per inch less
CutoutDynamic IslandDynamic IslandDynamic IslandNone
Rear main48MP48MP48MP 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 camera12MP12MP12MP 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)
ChipA19A19A20 ProA20 Pro
Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity.30 hrs30 hrs44 hrs31 hrs
PortUSB-CUSB-CUSB-CUSB-C
Wireless5G · Wi-Fi · Bluetooth5G · Wi-Fi · Bluetooth5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem
Water resistanceIP68 (6m for 30 min)IP68 (6m for 30 min)IP68 (6m for 30 min)IP68 (6m for 30 min)
Storage256 – 512 GB256 – 512 GB256 GB – 2 TB256 GB – 2 TB
Launch price — Base configuration at launch, in US dollars.799 dollars799 dollars1,999 dollars, 1200 dollars more1,999 dollars, 1200 dollars more
ReleasedSep 2025Sep 2025Oct 2026Oct 2026
StatusCurrentCurrentCurrentCurrent

Dimensions

The iPhone Duo (closed) is 31.8 mm (1.25 in) shorter, 12.6 mm (0.50 in) wider, 3.35 mm (0.13 in) thicker and 77 g (2.72 oz) heavier than the iPhone 17. The iPhone 17 measures 149.6 × 71.5 × 7.95 mm (5.89 × 2.81 × 0.31 in) and weighs 177 g (6.24 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 17

Questions about these phones

How does the height of the iPhone 17 compare to the iPhone Duo?

The iPhone 17 is 31.8 mm taller than the iPhone Duo in closed. The iPhone Duo is 12.6 mm wider than the iPhone 17.

What is the weight difference between the iPhone 17 and the iPhone Duo?

The iPhone Duo weighs 77 g more than the iPhone 17. This weight difference is noticeable.

Which has a bigger screen the iPhone 17 or iPhone Duo?

The iPhone 17 has a 6.3 inch display while the iPhone Duo has a 5.4 inch outer display. The iPhone 17 screen is 0.9 inches larger.

Is the iPhone 17 easier to hold one-handed than the iPhone Duo?

The iPhone 17 is easier to use one-handed than the iPhone Duo. The iPhone 17 is better for small hands.

Do the iPhone 17 and iPhone Duo fit in a typical men's jeans pocket?

The iPhone 17 fits in a typical men's jeans pocket while the iPhone Duo does not. The iPhone 17 is more pocketable.

Is the iPhone Duo a size upgrade worth it over the iPhone 17?

Whether the iPhone Duo is a size upgrade worth it depends on your preference for a shorter but wider device. The iPhone 17 is taller and narrower than the iPhone Duo.