VOICE KEY
One-time purchase · No subscription

Master chords, progressions and scales. Pay once.

Voice Key is a focused piano practice app with 50 chord progressions, 21 scales and modes, and 7 levels of chord voicing, all for a single $25 payment.

Buy Voice Key — $25 Compare the cost
30
min
Today's practice
Hit 30 minutes a day to build a streak
MIDI keyboard is required
50
Chord progressions
Built with smooth voice leading
21
Scales & modes
One or two octaves at a time
7
Voicing levels
Triads through altered chords
$25
Once. Forever.
No monthly bill, ever
WHAT'S INSIDE

Three focused ways to practice

Chord Voicing

7 levels that take you from triads to extended and altered chords, with every inversion. Play any voicing in any octave and Voice Key checks the chord as you play it.

Easy to Expert
A Db9 chord shown on a staff with the keys lit up on the keyboard

Progressions

50 chord progressions, from Classic Cadence to the Andalusian. See the smoothest voicing on the staff, set the tempo with a built-in metronome and loop it in any key.

Easy · Medium · Hard · Expert
The Andalusian progression with its voicing on a staff and a 90 BPM metronome

Scales & Modes

21 scales and modes, from Major and Natural Minor to Harmonic Minor and Dorian. Learn them with the notes on the staff, then test yourself from memory.

Easy · Medium · Hard · Expert
C Natural Minor scale shown on a staff with the next key highlighted
BUILT TO KEEP YOU GOING

Track it. Master it.

The Mastery board showing progress dots for each progression in every key

Master all 12 keys

Clear a progression or scale three times flawlessly in every key to master it. The Mastery board shows exactly what's left.

Practice calendar showing 10 goal days and the stars earned each day

Build a daily streak

Set a 30-minute daily goal, earn stars and see every practice day on your calendar.

The seven Chord Voicing levels from Easy to Expert

Practice or test

Turn on Practice mode to see the notes on a staff with nothing timed or scored. Turn it off when you're ready to be scored.

THE MATH

Stop renting your practice app

Most piano practice apps charge around $20 every month. Voice Key costs less than two months of that, once.

TYPICAL SUBSCRIPTION APP
~$20/ month
After 1 year$240
After 2 years$480
After 3 years$720
Stop paying and you lose access.
VOICE KEY
ONE-TIME
$25once
After 1 year$25
After 2 years$25
After 3 years$25
Buy Voice Key — $25
Save$215in your first year alone.

Start your streak today

50 progressions, 21 scales and modes, 7 voicing levels, and a daily practice tracker. One payment, yours to keep.

Get Voice Key — $25