Offline Player is the best music player, which is free to download and easy to use. You can enjoy your favorite songs, even with no internet or WiFi. It supports almost all of the popular audio formats and lets you create and manage playlists.

You can also set the app to play songs in the background and use the lock screen to control it. It also supports headphones and music from the device's library. You can also control it with the buttons on the device's screen.