Apple has notified developers that the company will now require Retina Display compliant screenshots of their apps in order to be approved. The Retina Display resolution requirement is 960x640. The new requirements apply to iPhone and iPod app developers.
The new requirement applies to new apps, and updates to older apps.
“Required iPhone & iPod touch Screenshot Upgrade for Retina Display
When you create or update your apps in iTunes Connect, you must upload screenshots that are high-resolution. We require your screenshots as high-resolution images so that your app is optimized for the Retina display.
The requirements for high-resolution images are 960 x 640, 960 x 600, 640 x 960, or 640 x 920 pixels. Images must be at least 72 dpi, in the RGB color space, and the file must be .jpeg, .jpg, .tif, or .png. You can update your screenshot files at any time in iTunes Connect.”
When you create or update your apps in iTunes Connect, you must upload screenshots that are high-resolution. We require your screenshots as high-resolution images so that your app is optimized for the Retina display.
The requirements for high-resolution images are 960 x 640, 960 x 600, 640 x 960, or 640 x 920 pixels. Images must be at least 72 dpi, in the RGB color space, and the file must be .jpeg, .jpg, .tif, or .png. You can update your screenshot files at any time in iTunes Connect.”
The new requirement applies to new apps, and updates to older apps.