OneMusic is a free app that lets you listen to your favorite songs and manage your music library. It works without any servers, so it can be used anywhere. You can choose between two modes: you can listen to music in the background or you can have the app open in the foreground. In the background mode, you can set a timer to stop the music playing if you don't want to keep listening to it forever. In the foreground mode, you can use the app as a normal music player.

To listen to music, you need to copy the files from your device or from your cloud storage. You can choose between two options: you can choose to copy the files to the cloud storage of your choice or you can choose to have the app create a folder in your device. Once you have the files in the folder, you can start listening to the songs.

To add the songs to the playlist, you need to select the songs from the folder. To manage the songs, you can:

Play the songs in the order in which they are added to the list.