To learn and practice to relate the notes of the Guitar Bass on the staff and the fretboard.
This is the ad-free version of. A very useful app for those who play Guitar Bass.
It has a LEARNING SECTION on which you can click on the strings and frets of the Guitar Bass to see the corresponding note on the staff and its name.
It has PRACTICAL EXERCISES on which different notes appear on the staff and you have to click the string and fret corresponding to each particular note.
It also has a tuner.