Not sure what it is, but at a guess it'll either be:

1) A way to remember the order of the notes wrapping around the neck like the 'master the fretboard in 30 seconds' products do. Not really worthwhile.

2) An 'absolute fretboard trainer' style piece of software that tests your knowledge of the neck.

At £6.85, does it matter? If you're curious, take a look. It's probably a waste of time but for a few quid it might be worth a go.... I've fallen for some crap in my time :rolleyes: but hey..... it's the only way to learn...