Apple Makes it Mandatory For iPhone App Developers to Submit Retina Display Screenshots
while submitting them to the App Store.
Prior to this, developers could upload images for Retina Display, but it was not a mandatory requirement.
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 (more…)