Assuming an iOS app has been designed for iphone 4,5,6,6+ and iPad, what is the ideal dimension Sketch file to give to a developer? This is also assuming there are no major layout changes in the actual design.
I'm basically just wanting to avoid having to create a separate version for each resolution. Is it fair to just give 1 canvas size of the app and have the developer do the rest? I've been told by a previous colleague to just give 640x1136 and let him do the rest, but would like some other opinions.