do i need to take a screenshot of all the required screen size? Iphone and IPAD? .. what if i dont have a an iphone that is 5.5 inch( and i know there is no emulator in ios)
If you submit screenshots from the largest currently available (5.5" for iPhone / 12.9" for iPad) you can then select to use those screenshots for all the other screen sizes & ITC will resize them for you.