FretProGuitarNotesTrainer used to be worked into my daily practice routine. It did everything you needed it to. Every other fretboard learning tool has you identity notes on your phone. FretProGuitarNotesTrainer lets you play it on your guitar, which helps with memorization. However, in recent months something has happened with FretProGuitarNotesTrainer so that it doesn’t work properly. If I don’t play a note within 2 seconds it will register as a wrong note, and it will keep doing this repeatedly, even if you do hit the right note it is in a continuous loop of marking a wrong note. I’ve tried messing with a lot of the settings, adjusting the microphone sensitivity, and using different devices, but nothing works. It makes it very hard and frustrating to use. Before this bug, I would have given it 5 stars. However, it’s almost unusable now. I wouldn’t purchase the full version until it is fixed. I really hope the developer is able to fix it soon, because it used to be my favorite fretboard training app.