My 2 cents to the discussion about #Apple‘s upcoming #foldable #iPhone and #foldablePhones in general.
In terms of #aspectRatio, there is what I consider a perfect one. That’s the one where the ratio doesn’t change when you fold it.
a:b=b:2a
a:b=square root 2
In Germany we are used to it because #DIN standardized the An paper format. Those nerds even made it so that A0 has the area of 1 square meter.