The cost of creating a musical application can vary greatly depending on various aspects, including the app's complexity, features and functions, the platform(s) it targets (e.g., iOS, Android, web), the location and experience of the music app development companies, and the project timetable. Keep in mind that these are estimates and may vary based on the exact needs of your application. The following are some general price ranges:

Simple Music Player App: A basic music player app that allows users to play and manage their music library with standard features like play, pause, skip, and playlist creation. The cost of developing such an app might range from $10,000 to $30,000.

Music Streaming App: A more advanced music streaming app that offers features like online music streaming, personalized playlists, user profiles, social sharing, and integration with music libraries. The cost of developing a music streaming app could range from $30,000 to $100,000 or more.

Music Production or Composition App: An application that includes music creation tools, virtual instruments, recording, editing, and mixing functionalities. Developing such a feature-rich app could cost anywhere from $50,000 to $200,000, depending on the complexity of the tools and features offered.

Music Learning or Tutoring App: An app that provides music lessons, tutorials, sheet music, practice tools, and interactive learning features. The cost for developing a music learning app might range from $30,000 to $100,000, depending on the depth of content and interactive elements. Social Music Sharing App: An app that allows users to share their musical creations, collaborate with others, and interact with a community of musicians. The cost for building a social music sharing app could range from $50,000 to $150,000 or more, depending on the social networking aspects and the complexity of interactions.