Object: Use correct dimensions for creating an mobile application.
App icon and image sizes (All sizes measured in pixels and 72 resolution)
-Icon Size: 1024 x 1024
App image sizes (All sizes measured in pixels and 72 resolution)
-iPhone 5: Image Screen Size: 1136 x 640
For iPhone 6:750 x 1334 (@2x) for portrait
1334 x 750 (@2x) for landscape