Apple announced iOS7 and this new version of the OS seems to be coming with many changes regarding the interface. One of these changes is the app icons. They now have a different rounded corners, new grid and increased size for the iPhone.
Here are some free iOS7 icon templates that can help you create them easier and faster:
iOS 7 icon template (PSD and Sketch)
iOS7 app icon template (PSD)
iOS7 icon grid (PSD)
iOS7 icon template for Fireworks