SAS Survival Guide - Lite is the free version of the popular iTunes app, the SAS Survival Guide. This app is designed to provide users with a basic guide to wilderness survival. Based on the bestselling book, the app offers essential survival tools and information to help users navigate the outdoors.

The Lite version includes basic survival information such as building fires, finding water, navigating by the stars, and survival kit essentials. It also features photo galleries of cloud spotting and night sky navigation, as well as a video demonstration of knife skills by former SAS soldier and instructor, John "Lofty" Wiseman. Additionally, there is a 100+ question quiz to test users' survival knowledge and a survival checklist to help them prepare for trips.

Overall, SAS Survival Guide - Lite is a valuable resource for those looking to gain basic survival skills and knowledge. While the Lite version offers a limited amount of content, it still provides a solid foundation for outdoor enthusiasts.