According to my iPhone 5c device my app size is 3.1 MB. When i plug in my iPhones and iPads into Xcode i go to Product then Archive and the App store estimate size of my app is 2.8 MB. I have 5 storyboards, each storyboard with it's own ViewController.h and ViewController.m. Each ViewController has about 1350+ lines of custom code. Plus i have over 40 images of various sizes. How is my app so small? I was expecting 20-25MB. Is there an app store minimum size ? In other words, can my app get rejected automatically if it doesn't meet a certain possible minimum app store size in MB requirement?
Your app will not get rejected for being to small, they can get rejected for having no functionality though! I have had apps which were under 1 MB back in the early days. If you are concerned because you have a bunch of images in the app and expect it to be much larger than 3.1 MB, I would do some investigation to see if the images were added correctly and are in fact going into the app when you archive it.