# iPhone Duo display reference

> Screen dimensions, aspect ratios and size classes for iPhone Duo.

Source: https://iphoneduosupport.com/specs/


---

## Displays

| Display | Size | Pixels | Points @3x | Aspect | PPI |
| --- | --- | --- | --- | --- | --- |
| Inner (folding) display | 7.6" | 1878 x 2670 | 626 x 890 | 1.42 | 430 |
| Outer (cover) display | 5.4" | 1398 x 2034 | 466 x 678 | 1.45 | 460 |
| iPhone 18 Pro (for comparison) | - | 1206 x 2622 | 402 x 874 | 2.17 | - |

Pixel dimensions, sizes and PPI are published by Apple. Point dimensions are derived by dividing
pixels by a @3x scale factor and are not published directly by Apple.

## Size classes

| Display | Horizontal | Vertical | Notes |
| --- | --- | --- | --- |
| Inner | Regular | Regular | Leaves room for sidebars. Does NOT honor supported interface orientations. |
| Outer | Compact | Regular | Familiar iPhone environment. |

## Three SDK compatibility tiers

1. Not built with the iOS 27 SDK - app runs at a familiar size and aspect ratio.
2. iOS 27 SDK - app extends left of the status bar area on the inner display.
3. iOS 27.1 SDK - app extends to the screen edge; standard navigation and toolbar buttons lay out
   vertically under the status bar.

Source: https://www.apple.com/iphone-duo/specs/ and https://developer.apple.com/videos/play/tech-talks/111461/

---

Published by iPhone Duo Support (https://iphoneduosupport.com). Not affiliated with Apple Inc.