What resolution should my iPhone App Icon be?
graphics, icons, iphone, uikit
Solution
Resolution only matters when you are trying to match the size of an image across multiple devices (print, screen, etc)
App icons are always 57x57 and will display without any scaling thus resolution doesn't matter (you could save it as 72dpi, 65535dpi or missing the dpi metadata entirely--SpringBoard won't care and will draw it the same in all three cases)
Problem
What image resolution can/should be used for the icon.png file for an iPhone app? I know the size is 57 x 57 but what about the resolution?