黄河长江 is an iPhone app under the Education & Reference category. Developed by Beidou Digital Geography Technology Beijing Co. Ltd., this app serves as a companion to the book, offering users access to three-dimensional models, videos, and other educational resources. It aims to enhance the learning experience by providing interactive visual aids and supplementary materials related to the Yellow River and the Yangtze River.

Users can delve deeper into the geographical and historical significance of these iconic rivers through the app's immersive features. With a focus on education, 黄河长江 offers a unique way for individuals to explore and understand the importance of these waterways in Chinese history and culture.