Speed training that builds muscle memory. See a chord, play it, get faster. Shell voicings, rootless, ii-V-I — through every key.
Free. No signup. Works in Chrome & Edge.
Built by jazz pianists, for jazz pianists.
Plug in your keyboard. The app listens to what you play and auto-advances when you nail the chord.
The most important jazz progression, drilled through all 12 keys. Plus turnarounds and circle of fourths.
Root position, shell, rootless A, inversions — each shown on a visual 2-octave keyboard.
Hear every chord. Auto-plays on each new chord, or tap to listen again. Built-in metronome with BPM control.
Tracks time per chord. Shows your slowest keys, improvement trends, and personal records.
One-tap presets: Warm-Up, Speed Run, Challenge, Left-Hand Comping. Start training in 2 seconds.
Pick a practice plan or customize: voicing type, difficulty, progression mode, number of chords.
A chord appears on screen. Play it on your MIDI keyboard — or press Space to advance manually. The timer tracks your speed per chord.
See your results: total time, accuracy, slowest chords. Track progress over sessions and build daily practice streaks.