Pick a key and every note in that scale lights up on the neck. Nothing to read, nothing to set up. Prop it on your music stand and play, and the shapes start to stick.
root scale note chord tone
This is the real app, running in the page. Pick a key on the circle of fifths, set your tuning (drop C is welcome here), and step through the chords with the ← → keys.
It remembers your key, scale, tuning, and layout between visits.
There are no letters on the neck, on purpose. You start to see the scale as a shape hanging off the red root notes, the same way your fingers already find it. Twelve scales in every key, picked from a circle of fifths so you can see how the keys sit next to each other. And it's your neck. Add as many strings as you want and tune them however you play, whether that's standard, drop C, seven-string, or bass.
Pick any chord in the key and all of its notes turn green, right across the neck and sitting inside the scale you're already playing. Step through the chords of the key with the arrow keys and watch them move under your hands, without ever looking away from the guitar.
One key hides everything but the neck, and you can size it up until you can read it from across the room. No sign-up and no lessons to click through. It comes back in the same key you left it in, whether you're on your computer, in a browser, or on your phone turned sideways.
The browser version is free and always will be. The apps put the same thing on your computer and your phone, ready the second you open them and working with no internet at all.
Buy it once and it's yours for good. Every update and every new platform down the road is included, at no extra cost.
Checkout happens right here on the page. You get downloads for every platform that's ready, and iOS shows up the day it lands.
Fretboard Theory