Isomorphic Harp

IsoHarp3 is a real musical instrument for your phone or tablet. Built on a Jankó-style isomorphic layout, it turns your screen into a fully playable chromatic instrument that responds to every finger simultaneously. The bigger the screen, the better it gets — tablet players get a wide, expansive grid that's genuinely comfortable to play with both hands.

The isomorphic advantage

On a standard piano keyboard, every key looks the same but every scale and chord has a different shape. On IsoHarp3, every scale and chord has the same shape in every key. Learn a minor pentatonic once and you can play it in all 12 keys without thinking. The layout rewards practice in a way that traditional instruments simply can't.

True multi-touch

Every finger is tracked independently. Play a chord with four fingers while a fifth carries the melody. Slide between notes for expressive glides. The engine supports up to ten simultaneous voices limited only by your device's screen hardware.
Spatial stereo panning
Notes played on the left side of the screen sound in your left ear. Notes on the right sound in your right. Put on headphones and the music surrounds you.
Colour-coded at a glance
Every pitch class has its own colour across the entire grid. C is always red, G is always cyan, B is always blue. The colours make scales, chords, and intervals immediately visible — a second musical language that develops naturally as you play.


Features
Jankó-style isomorphic layout — whole steps across, half steps up
Works on phones and tablets — shines on larger screens
True multi-touch up to ten simultaneous notes
Automatic stereo panning left to right across the screen
Colour-coded pitch classes for instant visual navigation

Remembers your last selected instrument between sessions

Full screen immersive mode — no distractions, just music

No ads, no subscriptions, no internet connection required

IsoHarp3 is for curious beginners who want to understand music theory visually, for experienced players who want a new expressive tool on the go, and for anyone who has ever looked at a piano and wondered if there was a more logical way.

There is.