Foldable wallpaper guides
Sizes, setup and screen tricks for the iPhone Duo and other foldables.
iPhone Duo wallpaper size
iPhone Duo wallpaper sizes: cover screen 1398×2034, inner screen 2670×1878 (1878×2670 in portrait). Aspect ratios, safe zones for the clock and the fold, and file tips.
How to set a different wallpaper on each iPhone Duo screen
Step by step: put one wallpaper on the iPhone Duo inner screen and a matching one on the cover screen, without iOS cropping either. Works for any Home + Lock pair.
Do black wallpapers save battery on the iPhone Duo?
On OLED screens like the iPhone Duo's, pure #000000 black pixels are switched off. What that means for battery, why near-black isn't the same, and which wallpapers make a difference.
Depth effect wallpapers on the iPhone Duo
How the iOS depth effect works on the iPhone Duo cover screen, what makes a photo work with it, and how to turn it on or fix it when the subject stays behind the clock.
Foldable phone wallpaper sizes
Exact cover and inner screen resolutions for book-style foldables: iPhone Duo, Samsung Galaxy Z Fold7, Google Pixel 10 Pro Fold and OnePlus Open, plus how UNFOLD sets fit each.