iPhone Duo vs iPhone 18 Pro

The iPhone 18 Pro is 12.2 millimetres0.48 inches narrower and 32.2 millimetres1.27 inches taller than the iPhone Duo (folded).

The iPhone 18 Pro is 92.7 millimetres3.65 inches narrower and 32.2 millimetres1.27 inches taller than the iPhone Duo (unfolded).

Writing the comparison…

TRUE SCALE · 1.2 PX/MM

Hand: US Army ANSUR II, 2012 (sex-balanced median). Pockets: The Pudding, 2018. Card: ISO/IEC 7810 ID-1.

iPhone Duo (folded)iPhone Duo (unfolded) — from $1,999 at launch, ships 23 October.
iPhone 18 Pro — from $1,199 at launch, ships 18 September.

HeightWidthDepthWeightDuo117.8 millimetres4.64 inches84.1 millimetres3.31 inches11.30 millimetres0.44 inches254 grams8.96 ounces18 Pro150.0 millimetres, 32.2 millimetres more5.91 inches, 1.27 inches more71.9 millimetres, 12.2 millimetres less2.83 inches, 0.48 inches less8.75 millimetres, 2.55 millimetres less0.34 inches, 0.10 inches less211 grams, 43 grams less7.44 ounces, 1.52 ounces less

Height: Duo 117.8 millimetres, 18 Pro 150.0 millimetres.Height: Duo 4.64 inches, 18 Pro 5.91 inches.Width: Duo 84.1 millimetres, 18 Pro 71.9 millimetres.Width: Duo 3.31 inches, 18 Pro 2.83 inches.Depth: Duo 11.30 millimetres, 18 Pro 8.75 millimetres.Depth: Duo 0.44 inches, 18 Pro 0.34 inches.Weight: Duo 254 grams, 18 Pro 211 grams.Weight: Duo 8.96 ounces, 18 Pro 7.44 ounces.

HeightWidthDepthWeightDuo117.8 millimetres4.64 inches164.6 millimetres6.48 inches5.20 millimetres0.20 inches254 grams8.96 ounces18 Pro150.0 millimetres, 32.2 millimetres more5.91 inches, 1.27 inches more71.9 millimetres, 92.7 millimetres less2.83 inches, 3.65 inches less8.75 millimetres, 3.55 millimetres more0.34 inches, 0.14 inches more211 grams, 43 grams less7.44 ounces, 1.52 ounces less

Height: Duo 117.8 millimetres, 18 Pro 150.0 millimetres.Height: Duo 4.64 inches, 18 Pro 5.91 inches.Width: Duo 164.6 millimetres, 18 Pro 71.9 millimetres.Width: Duo 6.48 inches, 18 Pro 2.83 inches.Depth: Duo 5.20 millimetres, 18 Pro 8.75 millimetres.Depth: Duo 0.20 inches, 18 Pro 0.34 inches.Weight: Duo 254 grams, 18 Pro 211 grams.Weight: Duo 8.96 ounces, 18 Pro 7.44 ounces.

Specifications

Specifications for iPhone Duo (folded), iPhone 18 Pro. Differences are given against iPhone Duo (folded).
Specification	Duo	18 Pro

Height	117.8 millimetres4.64 inches117.8 millimetres4.64 inches	150.0 millimetres, 32.2 millimetres more5.91 inches, 1.27 inches more150.0 millimetres, 32.2 millimetres more5.91 inches, 1.27 inches more
Width	84.1 millimetres3.31 inches164.6 millimetres6.48 inches	71.9 millimetres, 12.2 millimetres less2.83 inches, 0.48 inches less71.9 millimetres, 92.7 millimetres less2.83 inches, 3.65 inches less
Depth	11.30 millimetres0.44 inches5.20 millimetres0.20 inches	8.75 millimetres, 2.55 millimetres less0.34 inches, 0.10 inches less8.75 millimetres, 3.55 millimetres more0.34 inches, 0.14 inches more
Weight	254 grams8.96 ounces254 grams8.96 ounces	211 grams, 43 grams less7.44 ounces, 1.52 ounces less211 grams, 43 grams less7.44 ounces, 1.52 ounces less
Volume	111.9 cubic centimetres6.83 cubic inches100.8 cubic centimetres6.15 cubic inches	94.4 cubic centimetres, 17.6 cubic centimetres less5.76 cubic inches, 1.07 cubic inches less94.4 cubic centimetres, 6.5 cubic centimetres less5.76 cubic inches, 0.39 cubic inches less
Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure.	89 percent90 percent	89 percent, 1 percent more89 percent, 1 percent less

Display size — Screen size is always quoted in inches.	5.4 inches7.6 inches	6.3 inches, 0.9 inches more6.3 inches, 1.3 inches less
Resolution	1398 × 20341878 × 2670	1206 × 26221206 × 2622
Pixel density	460 pixels per inch430 pixels per inch	460 pixels per inch, the same460 pixels per inch, 30 pixels per inch more
Cutout	Dynamic IslandNone	Dynamic IslandDynamic Island

Rear main	48MP Fusion f/1.648MP Fusion f/1.6	48MP Fusion, variable aperture f/1.48-f/4.048MP Fusion, variable aperture f/1.48-f/4.0
Rear ultra-wide	48MP Ultra Wide f/2.248MP Ultra Wide f/2.2	48MP Fusion f/2.248MP Fusion f/2.2
Rear telephoto	——	48MP Fusion 100mm (4x optical, 8x optical-quality)48MP Fusion 100mm (4x optical, 8x optical-quality)
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)	18MP Center Stage f/1.918MP Center Stage f/1.9

Chip	A20 ProA20 Pro	A20 ProA20 Pro
Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity.	44 hrs31 hrs	36 hrs36 hrs

Port	USB-CUSB-C	USB-CUSB-C
Wireless	5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem	5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem
Water resistance	IP68 (6m for 30 min)IP68 (6m for 30 min)	IP68 (6m for 30 min)IP68 (6m for 30 min)

Storage	256 GB – 2 TB256 GB – 2 TB	256 GB – 2 TB256 GB – 2 TB
Launch price — Base configuration at launch, in US dollars.	1,999 dollars1,999 dollars	1,199 dollars, 800 dollars less1,199 dollars, 800 dollars less

Released	Oct 2026Oct 2026	Sep 2026Sep 2026
Status	CurrentCurrent	CurrentCurrent

iPhone Duo vs iPhone 18 Pro

The iPhone 18 Pro is 12.2 millimetres0.48 inches narrower and 32.2 millimetres1.27 inches taller than the iPhone Duo (folded).

The iPhone 18 Pro is 92.7 millimetres3.65 inches narrower and 32.2 millimetres1.27 inches taller than the iPhone Duo (unfolded).

The folded iPhone Duo trades a slender grip and easy pocketing for a squatter, noticeably heavier build.

Easier one-handed: iPhone 18 Pro

Pocket: iPhone 18 Pro

Weight difference: Noticeable

iPhone 18 Pro feels much easier to wrap your fingers around, whereas iPhone Duo feels broad and chunky in a single hand.
iPhone 18 Pro slides smoothly into median men's pockets, while the thicker iPhone Duo creates noticeable bulk and drags on fabric.
iPhone Duo feels significantly heavier in a jacket pocket or during prolonged handheld reading than iPhone 18 Pro.

Writing the comparison…

TRUE SCALE · 1.2 PX/MM

Hand: US Army ANSUR II, 2012 (sex-balanced median). Pockets: The Pudding, 2018. Card: ISO/IEC 7810 ID-1.

iPhone Duo (folded)iPhone Duo (unfolded) — from $1,999 at launch, ships 23 October.
iPhone 18 Pro — from $1,199 at launch, ships 18 September.

iPhone Duo (folded)iPhone Duo (unfolded) — from $1,999 at launch, ships 23 October.
iPhone 18 Pro — from $1,199 at launch, ships 18 September.

Specifications

Specifications for iPhone Duo (folded), iPhone 18 Pro. Differences are given against iPhone Duo (folded).
Specification	Duo	18 Pro

Height	117.8 millimetres4.64 inches117.8 millimetres4.64 inches	150.0 millimetres, 32.2 millimetres more5.91 inches, 1.27 inches more150.0 millimetres, 32.2 millimetres more5.91 inches, 1.27 inches more
Width	84.1 millimetres3.31 inches164.6 millimetres6.48 inches	71.9 millimetres, 12.2 millimetres less2.83 inches, 0.48 inches less71.9 millimetres, 92.7 millimetres less2.83 inches, 3.65 inches less
Depth	11.30 millimetres0.44 inches5.20 millimetres0.20 inches	8.75 millimetres, 2.55 millimetres less0.34 inches, 0.10 inches less8.75 millimetres, 3.55 millimetres more0.34 inches, 0.14 inches more
Weight	254 grams8.96 ounces254 grams8.96 ounces	211 grams, 43 grams less7.44 ounces, 1.52 ounces less211 grams, 43 grams less7.44 ounces, 1.52 ounces less
Volume	111.9 cubic centimetres6.83 cubic inches100.8 cubic centimetres6.15 cubic inches	94.4 cubic centimetres, 17.6 cubic centimetres less5.76 cubic inches, 1.07 cubic inches less94.4 cubic centimetres, 6.5 cubic centimetres less5.76 cubic inches, 0.39 cubic inches less
Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure.	89 percent90 percent	89 percent, 1 percent more89 percent, 1 percent less

Display size — Screen size is always quoted in inches.	5.4 inches7.6 inches	6.3 inches, 0.9 inches more6.3 inches, 1.3 inches less
Resolution	1398 × 20341878 × 2670	1206 × 26221206 × 2622
Pixel density	460 pixels per inch430 pixels per inch	460 pixels per inch, the same460 pixels per inch, 30 pixels per inch more
Cutout	Dynamic IslandNone	Dynamic IslandDynamic Island

Rear main	48MP Fusion f/1.648MP Fusion f/1.6	48MP Fusion, variable aperture f/1.48-f/4.048MP Fusion, variable aperture f/1.48-f/4.0
Rear ultra-wide	48MP Ultra Wide f/2.248MP Ultra Wide f/2.2	48MP Fusion f/2.248MP Fusion f/2.2
Rear telephoto	——	48MP Fusion 100mm (4x optical, 8x optical-quality)48MP Fusion 100mm (4x optical, 8x optical-quality)
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)	18MP Center Stage f/1.918MP Center Stage f/1.9

Chip	A20 ProA20 Pro	A20 ProA20 Pro
Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity.	44 hrs31 hrs	36 hrs36 hrs

Port	USB-CUSB-C	USB-CUSB-C
Wireless	5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem	5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem
Water resistance	IP68 (6m for 30 min)IP68 (6m for 30 min)	IP68 (6m for 30 min)IP68 (6m for 30 min)

Storage	256 GB – 2 TB256 GB – 2 TB	256 GB – 2 TB256 GB – 2 TB
Launch price — Base configuration at launch, in US dollars.	1,999 dollars1,999 dollars	1,199 dollars, 800 dollars less1,199 dollars, 800 dollars less

Released	Oct 2026Oct 2026	Sep 2026Sep 2026
Status	CurrentCurrent	CurrentCurrent

Questions about these phones

How do the dimensions of iPhone Duo (folded) and iPhone 18 Pro compare?

iPhone 18 Pro measures 150 mm tall, 71.9 mm wide, and 8.75 mm thick, making it 32.2 mm taller than iPhone Duo (folded). In contrast, iPhone Duo (folded) has a shorter but wider and thicker profile at 117.8 mm tall, 84.1 mm wide, and 11.3 mm thick.

Which phone is lighter, iPhone Duo (folded) or iPhone 18 Pro?

iPhone 18 Pro is noticeably lighter at 211 g, compared to 254 g for iPhone Duo (folded). That is a 43 g difference in weight.

Which phone is easier to use with one hand?

iPhone 18 Pro is easier to handle with one hand and better for smaller hands due to its narrower 71.9 mm width. The 84.1 mm width of iPhone Duo (folded) makes it substantially wider to span in an average adult hand.

How do iPhone Duo (folded) and iPhone 18 Pro fit into pockets?

iPhone 18 Pro fits into a median men's jeans pocket, though it does not fit into a median women's jeans pocket. iPhone Duo (folded) does not fit into either median men's or women's jeans pockets.

How do the display sizes compare between iPhone Duo (folded) and iPhone 18 Pro?

iPhone 18 Pro has a 6.3-inch screen with a resolution of 1206 × 2622. iPhone Duo (folded) features a 5.4-inch display with a resolution of 1398 × 2034.

What is the physical tradeoff between iPhone Duo (folded) and iPhone 18 Pro?

iPhone 18 Pro offers a slimmer, lighter, and more pocketable profile. iPhone Duo (folded) offers a much shorter height at 117.8 mm, but increases depth to 11.3 mm and weight to 254 g.

iPhone Duo vs iPhone 18 Pro

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Specifications

Also compared with iPhone Duo (folded)

iPhone Duo vs iPhone 18 Pro

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Specifications

Also compared with iPhone Duo (folded)

Questions about these phones

Questions about these phones