흘러간 옛노래 is a free multimedia app for Android that provides users access to a vast collection of nostalgic music from the 70s and 80s, including old pop songs, folk music, and disco. Designed for ease of use, the app features a large interface and intuitive touch controls that allow users to play music with a single tap. Key features include lyric support for sing-alongs, a timer for automatic music stop, and a dark mode to reduce eye strain, ensuring a user-friendly experience.

The app allows users to save their favorite songs in a personal library for convenient access at any time. It also offers a search function to quickly find desired tracks and supports continuous playback even when the phone screen is off. Users can create personalized playlists with options for repeat, shuffle, and continue playing. With Bluetooth connectivity for car use and a dedicated night mode, 흘러간 옛노래 enhances the overall music listening experience.