Rack Builder is an iPhone application developed by Thomas Lang. It falls under the category of Education & Reference and is a useful tool for military personnel and enthusiasts who want to create their own ribbon rack. With Rack Builder, users can easily build their ribbon rack in just a few seconds.

The app offers a simple and intuitive interface, allowing users to choose their branch, pick their ribbons, and add devices. Whether you're a veteran, active-duty service member, or a collector, Rack Builder provides a comprehensive selection of ribbons and devices to choose from.

One of the standout features of Rack Builder is the ability to customize the app icon. Users can choose from a variety of options to personalize their app icon, making it easy to identify on their home screen.

Overall, Rack Builder is a convenient and user-friendly application for anyone looking to create their own ribbon rack. With its extensive selection of ribbons and devices, building your ribbon rack has never been easier.