iPhone and iPad Resolutions

Here is a list with iOS Hardware Devices Resolution:

iPhone 3, 3S – 480×320 px at 165 ppi
iPod Touch (1-3 gen) – 480×320 px 165 ppi
iPod Touch 4 gen – 960×640 px at 330 ppi
iPhone 4, 4S – 960×640 px at 330 ppi
iPhone 5, 5S – 1136×640 px at 326 ppi (wider)
iPhone 6, 6+ – 1334×750 px at 326 ppi (wider)

iPad – 1024×768 px
iPad 2 – 1024×768 px
iPad Mini – 1024×768 px
iPad 3, 4 – 2048×1536 px

Here is a list with icon resolutions for each of those iOS devices:

iPhone 3, 3S – 57×57 px
iPod Touch (1-3 gen) – 57×57 px
iPod Touch 4 gen – 114×114 px
iPhone 4, 4S – 114×114 px
iPhone 5 – 114×114 px
iPad 3, 4 – 144×144 px
iPad Mini – 72×72 px
iPad 2 – 72×72 px
iPad 1 – 72×72 px