Ahead of Apple’s iOS 7 launch (presumably alongside the new iPhones in September), Apple seems to be asking developers to submit larger app icons. As part of iOS 7’s dramatic interface changes, the Home screen icons have been slightly enlarged compared to the iOS 6 icons.
For example, as shown in the image above, the non-iOS 7-optimized Netflix icon has a small white border compared to Apple’s icons.
In order to avoid this interface issue, developers will need to include larger icons in their applications. iOS 6 icons on the iPhone come in at 114 x 114 pixel resolutions, while iOS 7 icons are slightly larger at 120 x 120 pixel resolutions. For the iPad, iOS 6 icons are at resolutions of 144 x 144, and on iOS 7 they come in at a resolution of 152 x 152: