All the songs on your device are shown on the left side of the screen, as well as a search bar to help you find a specific one, while all the songs that are in the playlist are on the right side of the screen. Just select a song and tap the first triangle to add a song to your playlist.
It's just as easy to remove songs from your playlist, simply select the unwanted song and tap the second triangle. The app has two more buttons, one to add all songs to the playlist, and another to remove all songs.
On top of all that, PlayLister displays the number of songs in your playlist and its total duration at the bottom of the screen. Create and play your own unique playlists!