Few important points I wanna make: -The chords written are not accurate to what is being played. The developer confuses major/minor/dominant chords. So basically everything. Measures and song forms are written very poorly. Good luck figuring it out on your own. -Tracks don’t sound authentic to any of the styles available. I mean not even single one. I understand if the developer is a metalhead not familiar with jazz music, but the person is an amateur musician who really needs to study more music. -Basically it’s just a guitar player playing poorly made riffs over drum machines. And even the guitar tones sound really cheap. If you’re a serious musician you will immediately figure out that you’ve made a mistake by paying high dollars. If you’re a beginner, only thing you will get out of this app will be a bad habit of misreading music. I’m seriously ashamed of spending money on this app. I could’ve made a better library of jam tracks on my own in a single day. Sorry developers. Hope you made enough money to go take some music lessons.