The cost of developing a music streaming app can vary depending on various factors, such as the complexity of the app, the features you want to include, the platforms you want to support, the location of the development team, and more.

A basic music streaming app with essential features can cost around $25,000 to $35,000 to develop. However, if you want to build a more complex app with advanced features like personalized playlists, social sharing, and voice recognition, the cost can range from $40,000 to $50,000 or more.