While the iPhone 4 screen's aspect ratio is 1.5:1, but the iPhone itself is 115.2 mm x 58.66 mm (approx 1:2). So, the same reasoning should apply to two finger

While the iPhone 4 screen's aspect ratio is 1.5:1, but the iPhone itself is 115.2 mm x 58.66 mm (approx 1:2). So, the same reasoning should apply to two finger use horizontally.