Mobile Aspect Ratio

Mobile aspect ratio is the proportion between a device display's width and height. Modern iPhones use ratios near 19.5:9 (1290 × 2796 on the 6.7-inch class), older iPhones use 16:9 (1242 × 2208 on the 5.5-inch class), and iPads cluster around 4:3 (2048 × 2732 on the 12.9-inch class). Android phones span a wider range — 18:9, 19:9, 19.5:9, 20:9, 21:9 — and Android tablets cover 16:10 and 16:9. Aspect ratio matters for screenshots because Apple and Google enforce exact pixel dimensions per device size: a 6.7-inch iPhone screenshot must be exactly 1290 × 2796, not 'roughly that aspect ratio.' A template designed for 19.5:9 will look wrong on 4:3 unless it is re-laid-out, which is why porting between device classes is non-trivial. Aspect ratio also drives content density: a tall, narrow phone screenshot supports one strong headline over one strong visual, while a wide tablet screenshot can comfortably support side-by-side panels. Designing the screenshot layout around the device's aspect ratio — instead of squeezing a phone design into a tablet canvas — is one of the cleanest signals of a serious ASO process.