Visum Photo Viewer follows a standard procedure of using log files. These files log users when they use app. The information collected by log files include app version, country, language, device manufacturer, device model, operating system, operating system architecture, operating system version, date and time stamp. These are not linked to any information that is personally identifiable. The purpose of the information is for analyzing trends, administering the app, tracking users' movement on the app, and gathering demographic information.