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iPhone Duo wallpaper size: the exact pixels for both screens
Updated: September 24, 2026
Written before general availability. The display figures on this page come from Apple's published iPhone Duo technical specifications. iPhone Duo goes on sale 23 October 2026; the on-device steps below follow how iOS has worked on existing iPhones, and we will re-check every step against a shipping device and update this page.
iPhone Duo has two displays, and they do not have the same shape. If you only remember two numbers, remember these:
| Screen | Size | Resolution | Pixel density | Aspect ratio |
|---|---|---|---|---|
| Cover (closed) | 5.4‑inch OLED | 1398 × 2034 | 460 ppi | 1 : 1.455 |
| Inner (open) | 7.6‑inch OLED folding | 1878 × 2670 | 430 ppi | 1 : 1.422 |
The two screens are close, but not the same shape
This is the detail almost every “iPhone Duo wallpaper” page gets wrong. The cover screen is taller relative to its width than the inner screen — 1.455 versus 1.422, a difference of about 2.3%.
Small as that sounds, it decides what happens when you reuse one image on both screens:
- Take the inner image (1878 × 2670) and fit it to the cover screen's width: it comes out 1398 × 1988 — about 46 pixels short of the 2034 it needs. iOS fills the gap by zooming in, so you lose roughly 2% off every edge.
- Take the cover image (1398 × 2034) and fit it to the inner screen's width: it comes out 1878 × 2732 — about 62 pixels too tall, so the top and bottom get trimmed.
Either way something moves. If your wallpaper is a plain gradient you will never notice. If it has a horizon, a ring, a logo or any element you placed deliberately, it will land in a different place on each screen.
Why resolution alone is not the answer
There is a second, less obvious problem: pixel density. The cover screen is 460 ppi and the inner screen is 430 ppi. A pattern that is 100 pixels wide is physically about 7% larger on the inner screen than on the cover screen. For a gradient that is irrelevant. For anything with repeating structure — a grid, a wave, a grain — it is the difference between the two screens looking like one device and looking like two.
The fix is not a bigger file. It is two files, each composed for its own screen, with pattern scale set in physical units rather than pixels. That is what we mean by a matched pair.
What to export if you are making your own
- Cover: 1398 × 2034 px, no larger. Extra pixels are discarded, and an oversized file just costs storage.
- Inner: 1878 × 2670 px.
- Format: JPEG or HEIC for photographs and gradients; PNG only if you have hard edges or flat colour that would show JPEG artefacts.
- Keep the top sixth quiet. The clock, date and status icons sit there on both screens, and iOS does not add a scrim behind them on the Home Screen.
- Add a little noise. Smooth gradients band visibly on large OLED panels at low brightness. A tiny amount of grain — well under 1% — removes it.
Ready-made pairs
We draw and give away sixteen matched pairs at exactly these two sizes, free, no account: browse the wallpaper collection. Each one is two separate files, composed for its own screen.