Apple iPhone 17 vs Apple iPhone Duo: which should you buy?

Our pick

iPhone 17 for a 6.3-inch phone
iPhone Duo for a phone that opens into a 7.6-inch screen

Apple iPhone 17

$929 (256GB)

Get it if

You prefer a 6.3-inch phone that is 7.95 mm thin.
You prefer to unlock with Face ID.

Buy at Apple$929

Checked Nov 15, 2026 · We may earn a commission.

Apple iPhone Duo

$1,999 (256GB)

Get it if

You prefer a 7.6-inch screen that folds into your pocket, for reading, video and two apps at once.
You want to sketch or take notes with Apple Pencil.
You prefer a titanium body to aluminum.

Buy at Apple$1,999

Checked Nov 15, 2026 · We may earn a commission.

The iPhone 17 is the compact choice: a 6.3-inch phone 7.95 mm thin in an aluminum body, unlocked with Face ID. The iPhone Duo opens into a 7.6-inch inner screen with Apple Pencil support, closing to a 5.4-inch phone in a titanium body.

What's different

Thickness
iPhone 177.95 mm
iPhone Duo11.3 mm closed, 5.2 mm open
The iPhone 17 is a 6.3-inch phone 7.95 mm thin that weighs 177 g (6.24 oz). The Duo weighs 254 g (8.96 oz) and opens from a 5.4-inch cover screen to a 7.6-inch one, wide enough for two apps at once and for notes with Apple Pencil (USB-C); the iPhone 17 has no Pencil support. Closed, the Duo measures 11.3 mm thick, and 5.2 mm open.
Battery life by screen
Apple rates the iPhone 17 for up to 30 hours of video playback. The Duo gets up to 31 hours on its inner screen and 44 on its cover screen, so open, the two are close.
Chip
iPhone 17A19
iPhone DuoA20 Pro
The iPhone 17 runs the A19 and the Duo the A20 Pro. The iPhone 17 has an aluminum body and unlocks with Face ID; the Duo is a titanium fold with Touch ID in its side button.

What's the same

ProMotion up to 120Hz, an Always-On display and the Dynamic Island
48MP Fusion Main and Ultra Wide cameras, and Camera Control
Stereo speakers, and MagSafe wireless charging up to 25W
IP68 water and dust resistance, Wi-Fi 7 and a Ceramic Shield 2 front

Tale of the Tape

iPhone 17

iPhone Duo

FAQs

Which should you buy, the iPhone 17 or the iPhone Duo?

The iPhone 17 if you want a compact 6.3-inch phone; the iPhone Duo if you want a 7.6-inch screen that folds to pocket size, with Apple Pencil support.

Which has better battery life, the iPhone 17 or the iPhone Duo?

They are close when the Duo is open: Apple rates it for up to 31 hours of video playback on its inner screen, to 30 hours for the iPhone 17. On its cover screen the Duo is rated for up to 44.

Which is lighter, the iPhone 17 or the iPhone Duo?

The iPhone 17, at 177 g (6.24 oz) to the Duo's 254 g (8.96 oz).

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

The iPhone Duo. It opens to a 7.6-inch screen and has a 5.4-inch screen outside; the iPhone 17 has one 6.3-inch screen.