RER info is a free Android application developed by Sebastian Timocea that provides real-time train schedules for the region of Île de France. The app allows you to search for upcoming train times for suburban trains H, J, K, L, N, P, R, and U, as well as RER trains C, D, and E, passing at the station of your choice. The app uses the API Temps Réel Transilien to provide accurate and up-to-date information.

With RER info, you can easily plan your commute or your travels around Île de France. The app is straightforward to use, and the interface is user-friendly. The app only shows the schedules for the lines mentioned above, and it does not include RER A and B. However, the app is reliable, and the information provided is accurate. If you are looking for a useful tool to help you plan your trips around Île de France, RER info is definitely worth checking out.