Designing a simple settings icon
In this tutorial, I am starting from scratch. You don't have to know Sketch. Heck, you don't even have to know how to design. Sketch app is great for beginners because of its amazingly simple and intuitive user interface which helps you grasp the basics quickly (much quicker compared to Photoshop, for example).
How to Create an Icon Design Workflow in Sketch App 3
In this Sketch 3 tutorial we've learnt how to create a basic shape using different types of masking, how to use the Aeiconizer Plugin for a better app icon design workflow, and how to setup slices in order to export an app icon in all of the sizes needed to submit an app to the app store.