There will be a flashbulb of photographers around shortly to express their shock and contempt at the notion of a mere iOS device comparing to a "real" camera, or someone's main camera (even though in fact, the iPhone is the world's most popular camera by some considerable margin).
I enjoy the cameras in Apple products, but they are really ideally used for two particular types of photos: outdoor with good lighting, and those that do not require zooming. A camera you have is better than one you don't of course, but an iOS camera is not ideal for all kinds of photography, and compares really poorly to DSLRs (for example) in a number of areas.