This document provides a summary of an Android mobile application about the history of Jack the Ripper. The application has been localized into US Spanish, Chinese, and Japanese and includes icons, brief histories and descriptions of the canonical five victims of Jack the Ripper, suspects like Leather Apron, key evidence like the Dear Boss letter, and debates around additional potential victims beyond the canonical five. It aims to educate users on the infamous Whitechapel murders that occurred in 1888 London and the mystery surrounding the killer's true identity.