The iPhone 5 comes with a gorgeous new screen that has a lot more space for your app's content. But like in the past with the Retina display, you need to do a little work to gain the benefits of the larger screen. With a little thought and design, your apps can make use of the added space in interesting ways.
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/2763-how-to-update-your-apps-for-the-4-inch-iphone-5-display