iPhone device

iPhone screen resolution landscape (px)

iPhone screen resolution portrait (px)

new
iPhone 5

1136 x 640

at 326 ppi / 16:9 aspect ratio

640 x 1136

at 326 ppi / 16:9 aspect ratio

iPhone 4S
iPhone 4

960 x 640

at 326 ppi / 3:2 aspect ratio

640 x 960

at 326 ppi / 3:2 aspect ratio

iPhone 3GS
iPhone 3G
iPhone

480 x 320

at 163 ppi / 3:2 aspect ratio

320 x 480

at 163 ppi / 3:2 aspect ratio