Ist mein Zug pünktlich is an Android app designed for travelers who frequently use trains. It allows users to save frequently traveled train routes for quick access to punctuality information. The app supports additional train types, including Metronom, by selecting 'RE/RB' as the train type and entering the train number. Users can also save station inquiries to view arrivals and departures for various modes of transport, such as buses and ferries.

The app's data is sourced directly from the railway system, ensuring that users receive real-time updates on train delays. However, it is noted that some regional trains, like S-Bahn, may not be fully supported due to data access limitations. Users can opt to remove ads permanently through a support key. The app requires internet access for data retrieval and storage permissions for backup functionalities.