BanG Dream! Girls Band Party is a free music game for iPhone developed by Gamonster Inc. The game features seven different girls' bands, each with its unique style and personality. The bands are Poppin' Party, Afterglow, Pastel＊Palettes, Roselia, HELLO, HAPPY WORLD!, Morfonica, and Raise A Suilen. Players can choose their favorite band and participate in live performances of popular Japanese music and anime covers.

The game allows players to join forces with up to five friends to perform live shows together. There are no limitations on the number of times you can play, so you can enjoy the game as much as you want. BanG Dream! Girls Band Party also offers a collection of 35 band girl cards, which players can collect by unlocking band stories. The game has 2D technology, which makes the live performances of the bands come to life with vivid animations.