Purpose: Although it is acknowledged that abuse of portable listening devices such as high level of volume and long duration possibly occurs noise-induced hearing loss to young adults, there is no tool to accurately measure their levels and time duration. The present study aimed to develop a smartphone application which estimated user’s volume levels, the accumulated levels, and exposure time when he/she listened to music. Methods: The application which mainly consisting of service and activity was developed for Android users. Service function worked for measurement and transmission of data in the back, whereas the activity function with main activity and fragment took charge of various screen displays in the front. In addition, all data of application users was sent to a server system having Apache, Hypertext Preprocessor, My Structured Query Language and saved in real time. Finally, accuracy and reliability of the application was proved by using sound level meter and artificial ear simulator system. Results: The developed application had measurement image and data image. For the measurement image, image bar, option bar, graph view, text view, and seek bar were displayed during the listening to music. Data image presented four graphical views by time, daily, weekly and monthly and a calendar view with three different color codes. All data was saved at every five seconds in the main server system. Conclusion: Although preliminary data was run by three subjects to fully confirm any component for malfunction of the application, no problem was found. If applying further clinical study with a large size of participants, we expect that the application will be very helpful for the users to prevent themselves from hearing insult induced by high levels of music and long exposure time.