Libraries are developing mobile Web sites to keep up with the dynamic landscape of emerging technologies. However, the development of a mobile Web site is not as simple as serving the existing desktop Web site on a handheld device. Library developers can use analytics software to better understand users and to develop a user-centered mobile Web site. This case study explores the use of a library’s traditional desktop Web site’s analytics information in creating a mobile interface. 2 Although Web analytics can provide a great amount of information about users, data should be used as supplementary information. Usability testing, focus groups, and surveys are other methods that can be conducted to understand users. Analytics cannot be a substitute for these types of user input, yet it may be useful for the initial development of mobile Web sites.