This game is a just quick money grab. They don't do any worthwhile updates. A lot of the music is absolute trash and you have to play through it to advance. They heavily limit that amount you can play without spending money. There are a lot of inconsistencies in the sound and the app has to be recalibrate between every song, but won't let you calibrate for any particular song. The leaderboard is very competitive which is my favorite part of the game