Affluences is a free Android app that provides real-time information on the availability of seats in libraries. The app is developed by Affluences and is currently available in Paris, Clermont-Ferrand, Rennes, Toulouse, and Angers. With Affluences, users can avoid the hassle of searching for a place to study in the library. The app provides accurate information on the number of seats available, waiting time, and occupancy prediction algorithm. Affluences uses different sources of information such as library counters, school calendars, and user data to calculate the current and predicted occupancy of the library. The app is easy to use and provides a transparent information system for users to plan their library visits. Affluences is a Proxima Mobile certified app, which recognizes free and ad-free services that facilitate the daily life of citizens on mobile devices.