Which device shows 1:1 content biggest?
Instagram square
Of the 66 devices tracked, the iPad Pro 13″ (M5) shows 1:1 content largest, about 11.0″ across. Best phone: Galaxy S26 Ultra (4.1″). Best foldable: Galaxy Z TriFold (8.4″). Best tablet: iPad Pro 13″ (M5) (11.0″).
1:1 is the square: Instagram posts, album art and many social images. Squarish screens win: the Pixel Pro Folds use over 95% of their inner screen, while any tall phone shows a square in less than half of its display.
Galaxy S26 Ultra · ≈4.1″
Galaxy Z TriFold · ≈8.4″
iPad Pro 13″ (M5) · ≈11.0″