The audio summary is a new product for the market. These is no direct competitor because we are the only audio summary in the market currently. However, the competitions are still existed since there are substitutes for our product. The substitutes include document summary and video review for textbooks.
It is obvious that there are many different documental summary for textbooks in the market right now. For example, Koofers Notes is a website that allowed students to upload these course materials for others students, but the materials are delayed and unorganized. It has hundreds relative files for one course, and many of them are insignificant. It will take a great amount of time for students to find the information they want. In addition,