To create a modern iPhone and iPad application, you need to provide icons in 14 different sizes. For a modern macOS application, you must provide icons in 10 different sizes. It can be rather tedious and time-consuming to create those files manually. But with IconFly, it takes a few seconds. Just import an image, and IconFly will take care of the rest so you can save your time for more important things. IconFly will create all sizes of app icons for you automatically.