What's the best iOS game for rhythm-based music battles with a fun storyline and challenging gameplay?

Friday Night Funkin' Mobile is a great iOS game for rhythm-based music battles. It offers a fun storyline, challenging gameplay, and a unique art style that appeals to both casual and hardcore rhythm game enthusiasts. In this game, players engage in musical battles against various opponents, hitting notes in sync with the beat to progress. The mobile version is designed to be accessible, with some modifications to note patterns making it easier to pick up than the PC version. Many players find the mobile remix to be more enjoyable, praising its simplicity and calmness. Additionally, the game's open-source nature allows for modding, letting players add custom songs and characters, extending the game's lifespan and creative possibilities. For those looking to get the most out of the game, consider exploring the modding community to add new content and challenges.