Odii is a free audio guide application created by the Korea Tourism Organization (KTO) that provides information on the history and culture of major tourist attractions in Korea. It currently has more than one million users from Korea and abroad.

Ranging from prehistoric times to the Three Kingdoms Period (Silla, Baekje, and Gaya history tours) and the present, Odii invites you on a journey through the great history and culture of Korea, walking tours to charming tourist cities like Seoul, Jeju, Incheon, and Jeonju, UNESCO World Heritage tours to sites such as Hahoe Village and Haeinsa Temple, national museum tours, and various other themed tours.