As an app designer, having only one screen size to worry about makes things a lot easier. Apple has done a lot to preserve the sanctity of its app ecosystem and I believe that this is why iOS apps have better quality and quantity. Obviously we are used to designing for multiple screens with android and even for iOS we have to make some minor adjustments based on retina vs non. and the taller screen (though most non game apps easily adjust to the taller 4" screen) Does anyone have any good suggestions or speculations on how apple could increase the size of the iphone screen without creating a major headache for developers? For example if they simply went with a 4.7" 16:9 screen, how would the math work for developers to quickly and easily update their apps (while also supporting multiple sizes) without having to completely redesign and recode them?