DDup is an iPhone app designed to help high school students in China prepare for their college entrance exams, known as the Gaokao. With a focus on sharing knowledge and experiences, DDup aims to create a platform where students, teachers, and experts can interact and exchange information related to the Gaokao.

One of the key features of DDup is the "Gaokao Relay Baton," which allows users to access and share updates, exam preparation tips, post-exam reflections, and college application guidance. This feature provides students with a platform to seek clarification, share experiences, and stay updated with relevant information.

DDup also boasts a team of experienced educators who have developed a series of high-quality exam preparation courses. These courses are designed to help students effectively review key topics and ensure they are well-prepared for the Gaokao.

The app follows a lightweight learning approach, with recorded lessons lasting no longer than 15 minutes. Each lesson is broken down into detailed segments using a knowledge map, allowing students to easily grasp and absorb each concept within a limited timeframe.

From interpreting exam policies to hearing firsthand experiences from senior students, DDup offers a wide range of content to support students throughout their Gaokao journey.

Please note that the developer can be contacted via email at