BASS NOTE FINDER is a tool that will help you with reading music, regardless of your level. It will give you the insight to find notes on the whole fretboard of your instrument.
This app was built by a small team of professional music teachers from the Netherlands.
The functionality is very straightforward:
You can tap on a staff to see where on the bass a certain note can be played. You will see this both on an overview picture of a bass in the middle of the screen, and on a picture of an enlarged position.
You can select which position to be enlarged. If you tap on this position, the corresponding note will appear on the staff.
Both by tapping on the staff and on the enlarged fretboard, you will hear te corresponding tone, and the name of the note will appear on the left of the staff.
Lastly, you can set the notes on the staff to be sharp or flat, or back to natural.