Absolute Fretboard Trainer is a software specially designed to master for complete notes on the fret board of a guitar or bass. Exercises are available to self-evaluate your progress and move to the next level. The exercises are varied to help you master a number of techniques and styles. It consists of 18 lessons with detailed examples for better understanding. The exercises are especially designed to make the fewest mistakes possible in improvisation while expanding your vocabulary on the instrument. A few minutes of exercise a day is enough if one is focused and applied. The graphical interface is a bit confusing; especially for reading the progression table for the rest everything is fine.