Doesnt work well on iPhone 4. Seems like a Russian knock off of another popular battle rap app thats been out for years. Has a nice design and audio mix quality but its more of a track battle app and doesnt have a live element to it. Voting is also rigged because you dont have to fully listen before voting. Tournament just shows a white screen and have to restart app. They try to charge you a subscription fee to play your own beats, but if you just turn beat volume all the way down, you can play your own in the background and record through mic.