Purpose This paper aims to discuss the possibilities of using a mobile application in the process of conducting an inventory of library collection and present an application for the same. The application scans barcode labels on books and retrieves data about those books. Data regarding the status and call number of each book can be changed using this application. Design/methodology/approach This paper is based on a case study of developing an application for the Android platform, and this application is part of the BISIS library management system. Findings By analysing the procedure of conducting an inventory in the library of the Faculty of Science, University of Novi Sad, it is concluded that this procedure is tedious and can be simplified. To make this procedure more efficient, a mobile application enabling search and update of bibliographic records has been developed. That application communicates with the BISIS library management system using a specially designed service. Practical implications By introducing this application at the libraries, the process of inventory of a library collection can be simplified, the time needed for the inventory will be shorter and the inventory will require less physical effort. Originality/value The application is designed to help librarians during the process of inventory of library collections. During this process, librarians have to check status of every item on the shelves and to update catalogue with new information. This application enables mobility of librarians and updates information about items during checking the shelves.