The Idolmaster: Cinderella Girls Starlight Stage was a spin-off free-to-play rhythm game released for mobile devices based on The Idolmaster: Cinderella Girls. The game revolved around tapping icons of the idols in time with the background song. Different kinds of notes were introduced to show how each icon had to be tapped; these included simply tapping the icon, tapping and holding the icon, and tapping two icons simultaneously.