The iQuarius smartphone leak detection system from Aquarius Spectrum combines an Android app with an acoustic widget, a sensor that creates a powerful system that can perform pipe listening, acoustic survey and acoustic correlation. Pipe listening allows listening and recording very low-frequency sound vibrations. It also provides a graphical presentation of these frequencies. Acoustic survey allows for GIS-based acoustic logging that measures the vibration intensity in water pipes. The noise is recorded and automatically sent to the server for further analysis. Acoustic correlation occurs between two mobile sensors, allowing the user to pinpoint the exact location of a leak. It is ideal for leak detection service teams for both leak surveys and pinpointing. Results can be analyzed on the web application, and the app is available on Google Play. www.aquarius-spectrum.com.