Not bad

Good for highlighting where various notes are on the fretboard to find roots, 5ths, ect. Also nice for highlighting the scale you to want to play, but free has very few scales. Easy to get around though if you just enter in the notes of the scale.

Visually unatractive however and finicky trying to cycle through the dot icons to make them blank or a certain shape.

Milesdkdjsisosossss about FretBoard - Scales & Chords, v1.8