A man holds up an iPhone 5S overlooking a gorgeous Chinese-style pond, with rounded shrubs and a statue of a woman in the middle. The sun is shining, and he’s enjoying a look at your app on this iPhone 5s. The iPhone 5s will hold an image of 640 by 1136 pixels for your mock up. This would be great for a travel app or leisure app. The birds are singing and the sun is shining, and your mockup is just making it better.