Hi, first of all I want to say that I love this application. I purchased the unlimited version and am very happy with my purchase. It's been almost a year. 1. It's cheap (considering it's a one-time payment and valid for life) 2. I can carry any part of my mp3 collection to play 3. easy to pick up and hard to stop Today I ran into a problem with my new MP3s downloaded cannot be played in the app. says it is not compatible? It's the same format as my older MP3s, any suggestions for solving this issue are much appreciated, Devs? any solution? This game is amazing! You can download songs online and put them in the game for unlimited amount of music! But one that I don't like is that unless you get the lifetime pass, you have to wait 30 minutes to get a turn or 10 coins is a turn. If you like this game, you must get the lifetime pass. First of all, this is my favorite game because I love rhythm games. The quality and everything is great! As I downloaded mp3s on my phone, I can also play them. Right after each stage, an advertisement appears :( Conclusion this game is recommended for those who like this type of games, I even reached the world ranking omg