What's a good iOS app for listening to music offline without a subscription?

Music Echo-Offline Music is designed for users who want to listen to their own music files on their iPhone or iPad without relying on a constant internet connection or a paid streaming subscription. It allows you to import your music library and create playlists for offline listening. This is particularly useful for travel, areas with poor connectivity, or simply to save on data usage. The app supports various audio formats, ensuring compatibility with your existing music collection. It offers standard playback controls, playlist management, and background playback, so you can listen to music while using other apps. With Music Echo-Offline Music, you can enjoy your favorite tunes anytime, anywhere, without worrying about data charges or subscription fees.