A free program for Android, by Joy Journey Girls.

FNF Carnival – Rap Battle is the new beat-emulating game that you’ve been waiting for! The app is one of the best free music games available on the Android platform. It allows you to play a brand-new music game that will challenge you to your very core! The gameplay is simple: tap the arrows to get the beat, and follow the arrows to get the score. The more you score, the higher you’ll rank! It’s time to start your adventure! You can play the app online or offline, so you can play with friends or family whenever you’d like. The game has a wide variety of songs to choose from, including all the latest hits.