FoldWall

FoldWall is a wallpaper previewer and cropper for iPhone Duo. One wallpaper has to cover two screens, and until you actually set it there's no way to tell what either screen will get. FoldWall shows both at once. Drag or pinch your photo and the closed-screen and open-screen framings update side by side, so you can see how each one lands before you save anything. How it works 1. Pick one photo from your library. 2. Drag or pinch on either preview. Both framings update together. 3. Unfold the device to check the inner screen at full size. 4. Save, then set it from Settings ▸ Wallpaper. Why one photo covers two screens The cover screen shows almost exactly the middle vertical slice of the inner screen. You only ever set one wallpaper, and iPhone Duo takes from it whatever the active screen needs. That's why the framing matters, and why seeing both at the same time is the whole point.…