Wish I wouldve steered clear...

The pro version worked for a few months, then wouldnt launch. After following the developers suggestion to reinstall it, the pro content Id purchased disappeared.

I asked for help, and, after quite awhile, received a non-useful response. Further questions from me went unanswered.

On the plus side, the tuner works well. On the minus side (along with the shabby customer support), the backing-band sound on the progressions has a cheesy sound.

In general, Id have to say its a waste of time and money.

oleander parks about Guitar Master - Tuner and Chords Toolkit