Chords
Stop holding shapes. Start knowing chords.
A grip you can only hold is a picture. A grip whose root, third and seventh you can point to is a chord — and that difference is trainable.

Chord X-Ray, live in the app: it deals you a real grip and asks for what is inside it — every root, every third, every fifth. Tap the board to answer; every miss is remembered and comes back until it does not miss.
Build-a-Chord runs the other direction: an empty board, a chord name, and you place the grip note by note. Together they close the loop between recognising a chord and constructing one.

Built from intervals up
Chords are stacked intervals, so the training starts underneath: see any distance as a shape, then meet the shell voicings — root, third, seventh — that jazz comping is built on, then extend into sevenths and beyond.
By the time the progressions arrive in the Play tab, a chord symbol is not a diagram to recall. It is a set of choices you can see on the neck.
All of it lives in the app.
Create a free account and it is yours — no card, no trial clock, on the web today and on iPhone as soon as the App Store door opens.