Apple publishes pixel dimensions. The inner folding display is 7.6 inches at 1878 × 2670 pixels and 430 ppi. The outer cover display is 5.4 inches at 1398 × 2034 pixels and 460 ppi.
At a @3x scale factor that works out to 626 × 890 points for the inner display and 466 × 678 points for the outer. Note that the point figures are derived by dividing the published pixel dimensions by three, not published by Apple directly.
The inner display’s aspect ratio is roughly 1.42, against about 2.17 for iPhone 18 Pro — a substantially squarer screen, which is why fixed-aspect content letterboxes.
Why the point figures matter more than the pixels
Layout code works in points, not pixels. The number to hold onto is 626 points of width — against roughly 402 on an iPhone 18 Pro. That is more than 50% wider, which is why fixed frame widths are the single most common break.
// Tuned for a 402-point phone; off by 224 points here
content.frame(width: 390)
// Fills what it is given, with a readable cap
content.frame(maxWidth: .infinity).frame(maxWidth: 700)For snapshot tests
Alongside a manual pass in the iPhone Duo simulator, you can catch regressions cheaply in CI by rendering at these sizes:
| Display | Points | Use |
|---|---|---|
| Inner | 626 × 890 | Unfolded, the main target |
| Outer | 466 × 678 | Closed, compact width |
These will not exercise the hinge or the poses — Device Hub is needed for that — but they catch the fixed-width class of bug cheaply.
Full reference, including density and size classes, on the specs page.