This app can actually save money on textbooks because it allows the user to view the full text of more than 7,000 textbooks on an iPhone – for free.
Beware that this service is free up to a point. It makes its money through licensing these e-textbooks to customers. Each rental expires after a certain period, typically about 180 days. On the upside, CourseSmart says these e-books can cost about half as much as their print equivalents.
Cost: Free to try. Textbook prices vary by title.