Educational App provide convenient learning methods and anytime, anywhere learning experiences for learners . Content analysis is used to select the top 100 K12 educational apps in China and the United States, with multiple researchers categorizing and coding their App descriptions to construct a functional system of educational apps in China and the United States. Through the comparison, it is found that Chinese educational App focus mainly on subject knowledge and examination tutoring, while the United States emphasizes personalized learning, creative thinking, and the cultivation of comprehensive abilities. By drawing on their design concepts in terms of learning content, presentation methods, learning support, and personalization is helpful to promote the development and enhancement of Chinese educational App, and offer suggestions for the development of K12 educational App in China.