Fretboard trainer
Note Memorization Tool.
A voice calls a random note on the downbeat of every bar. Find it in four places on the neck before the next one lands. All twelve notes, always. No key crutches. This is how you learn the whole fretboard.
Press start and find every called note in four spots.
How to practise with it
Start slow. At 30 beats per minute you get eight seconds a note, which is plenty of time to think. When a note is called, do not hunt for it randomly. Go string by string: find that note on the sixth string, then the fifth, then the fourth, and so on, saying the string name as you land on it. Four locations a note is the goal, one per click.
As the shapes stop being a search and start being a memory, drop the tempo up. Getting comfortable at 90 to 120 means you actually know the neck rather than working it out each time. The players who can call any note anywhere without hesitating all did some version of this drill until it stuck.
Pair it with the fretboard explorer to see the note in context, and the chord library once you want to turn single notes into shapes.