should we use one big background image and scale that down for iphone4/5. but i read scaling is bad from 1334 to 960?? then what should we do for performance,should we use default-567h@2x.png for iphone 5 ,default-667@2x.png for iphone 6 and default@2x.png for iphone4?
by doing this , what my final .ipa size or app bundle increased or is automatically distinguish per device specific resource during downloading or installing application????
please give me your best answer, i appreciate it.