Harmodus Piano - Pure Tuning

Harmodus Piano is a piano keyboard and metronome app with just intonation.

JUST INTONATION
• Real-time retuning: the app analyzes the chord you hold and applies pure frequency ratios to its root.
• Switch between Equal, Just Major and Just Minor.
• Adjustable reference pitch.

CHORD DETECTION
• 17 chords detected in real time from the notes you play.
• Works with the on-screen keyboard and external MIDI.

18 SOUND SOURCES
• Acoustic and synthesizer timbres — organ, clarinet and more, plus waveforms such as sine and sawtooth.
• Damper pedal with natural resonance.

METRONOME
• 6-track mixer: accent, quarter, eighth, sixteenth, triplet and a custom n-tuplet.
• Odd meters (5, 7, …) add a second accent automatically.
• Tuplets and 2-beat n-tuplets (e.g. half-note triplets).
• A/B alternating patterns, tap tempo, count-in and auto-stop.
• Visible edge-flash and per-track click sounds.

MORE
• Touch and MIDI keyboard (Bluetooth or cable).
• Transpose, sustain / latch.
• 34 languages.

Purchase information:
All features are free with the 25 keys from C3 to C5 (including black keys), with no time limit. A one-time purchase permanently unlocks the full keyboard and keyboard scrolling; an active monthly or annual subscription also unlocks them. Existing one-time purchases and active subscriptions remain valid.
Eligible new users may be offered a 7-day free trial with either the monthly or annual plan. The one-time purchase does not auto-renew.

Privacy Policy:
https://harmoduspiano.musicatechlab.com/privacy/

Recent changes:
Improved audio handling after instrument and pedal changes, tutorials, and returning from the background.
Fixed metronome input dialogs, text alignment, and landscape display on tablets.
Removed unnecessary permission prompts at startup.