The application is intended for users of the Petrinja City Library and Reading Room, with the help of which users can search the library's e-catalog, view the calendar of events in the library, generate their user number in barcode, extend material lending, reserve material, check whether the library has a copy or request literature for seminar work. The application also includes Library opening hours, answers to frequently asked questions, contact details of all departments and services of the library and links to social networks.