The 合唱曲アプリ is a multimedia application designed for iPhone users, featuring a comprehensive collection of approximately 200 choral music pieces. This app allows users to easily browse through a list of choral works, facilitating searches based on song titles and composers. It also provides the functionality to search for and play related videos, enhancing the overall user experience.

Key features of the app include the ability to register favorite songs and share information with friends. The application utilizes YouTube’s streaming capabilities, adhering to the YouTube API terms of service. It is important to note that the app does not support caching or downloading of videos, ensuring that only publicly available content on YouTube is displayed.