I wrote a step-by-step tutorial on how to convert your sketch to a full vector app icon.

This tutorial covers:

• Start by sketching and decide which sketch to use for the final icon
• Doing research by creating moodboards and reading articles
• Start the vectorizing process in Adobe Illustrator
• Set up the workspace
• Import your artwork
• Place each element on it's own layer
• Combine shapes
• Choose a color palette (iOS 7 Color Palette, AI and ASE file)
• Color your vector work
• Add details
• Assembling all the elements
• Delivering the icon
• References

Instructions on how to use the Icon app template:

Watch this brief Vimeo video:

How to use the App Icon Template from Michael Flarup on Vimeo.

Hopefully you will find it helpful in your own projects, let me know.

Read the tutorial on Designmodo