Introducing Guitar Trainer , an application for Java cell phones that will help you learn the notes on the fretboard of any stringed instrument- guitar, bass, banjo, mandolin, ukulele and more. Take your playing to the next level by improving your working knowledge of the fretboard. You will gain a whole new understanding of the music you play. Move beyond tabs and into REAL music theory. This game will train you to instantly recognize any note on the fretboard , in any tuning of your choosing.