水庫即時查 is a free iPhone application designed to provide users with real-time data on reservoir water levels, particularly useful during the spring and summer months when water shortages may occur. The app aims to visualize water conditions, allowing citizens to stay informed about local reservoir statuses. It aggregates data from the Ministry of Economic Affairs' Water Resources Agency, ensuring users have access to relevant information regarding water supply in their region.

The app's primary features include automatic updates from self-recording instruments, although it is important to note that these readings are not subjected to thorough manual verification and should be considered as reference points. Additionally, data is entered daily by reservoir management units, but the update times may vary, with some data from weekends being inputted on Mondays. This application serves as a valuable tool for monitoring water conditions effectively.