Kho Tàng Ca Dao is a free Android application developed by Aregames that provides an extensive collection of Vietnamese folk literature, including Ca dao, Tục ngữ, and Thành ngữ. With over 10,000 Ca dao from all three regions of Vietnam and more than 7,000 popular Tục ngữ and Thành ngữ, this app is a valuable resource for anyone interested in Vietnamese culture and literature. The Tục ngữ and Thành ngữ are categorized based on the Vietnamese alphabet, while the Ca dao are organized into 10 main themes, such as love for the country, family relationships, and history. The app also includes a search function and allows users to mark their favorite pieces and share them with friends and family. Kho Tàng Ca Dao is easy to use, completely free, and has no special device access requirements.