Spiritus Invictus is an iPhone app that serves as a hub for Marine Raider lineage and history. It is not designed as a preparation app for MARSOC A&S or ITC, but rather as a resource for individuals interested in learning about the Marine Raider history.

The app is still in its early stages of development, and the developer, Invictus Apps LLC, has taken a few years to determine its purpose. As a result, they encourage users to reach out to them with content ideas and suggestions.

It is important to note that Spiritus Invictus is not an official product of the USMC, MARSOC, or the DOD. It is an independent application created by Invictus Apps LLC to provide information and resources related to Marine Raider lineage and history.