BOOK MARRY is an iPhone app developed by Nippon Jimuki Co.Ltd, targeting university students for sharing literature reviews within the campus. Users, including students and faculty, can post and accumulate reviews from their respective perspectives, which can then be utilized as references for lectures and reports. Additionally, users can maintain private records of literature through the "Memo" feature.

The app provides users with graphical representations of their achievements, such as the number of posts and genre distributions. Users can browse through others' reviews in a timeline format and explore highly-rated books within the university through rankings. BOOK MARRY serves as a platform where users may discover books in fields they have a hidden interest in.

As a study support service, BOOK MARRY facilitates efficient searching for reference materials for reports. It also functions as a life-enhancing service by helping users discover books that can impact their lives.