# Toz - Geometric Music

> Harmony has a shape.

Canonical page: [https://chrome-stats.com/d/id6756535612](https://chrome-stats.com/d/id6756535612)

## Overview

- **ID:** `id6756535612`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** 令川 潘
- **Category:** Music
- **Version:** 1.2.6
- **Last updated:** 2026-06-14
- **First published:** 2026-02-25
- **Size:** 24 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/toz-geometric-music/id6756535612)
- **Privacy policy:** [https://tozapp.tech/privacy](https://tozapp.tech/privacy)

## Description

You've heard harmony. Now see it.

On the Tonnetz grid, a major chord is a triangle pointing up. Flip it — minor chord. Add a corner — seventh chord. These aren't icons. They're the actual geometric structure of the notes.

Toz makes this 200-year-old music theory map something you can play.

--- ON THE GRID ---

Draw Chords
Drag to connect notes. △ = major, ▽ = minor, ∟ = dominant 7th. Hear the chord as you draw it.

Build Progressions
Link shapes into a sequence. A bar at the bottom tracks your harmonic path.

Set a Key
Tap any note as your tonal center. Pick major, minor, harmonic minor, or melodic minor. The grid shows what's in — and what's out.

MIDI Input
Plug in a keyboard. Every chord you play maps to a shape on the grid, in real time.

Chord Map
A reference for every triad, seventh chord, and scale shape on the Tonnetz. Tap to hear.

--- MADE FOR ---

- Composers who think about harmony spatially
- Music theorists doing Neo-Riemannian analysis
- Students who'd rather see intervals than just read about them
- Anyone who's wondered what their chords actually look like

--- HOW IT WORKS ---

The Tonnetz puts the circle of fifths, major-third cycles, and minor-third cycles on one grid. Chords stop being abstract symbols — they have positions, neighbors, and distances.

Move one note. The shape transforms. So does the sound.

Toz Pro
You may purchase an auto-renewing subscription through an In-App Purchase.
• Auto-renewable subscription
• 1 month ($1.99), 1 year ($14.99), and lifetime ($19.99 one-time purchase) options
• Your subscription will be charged to your Apple ID account at confirmation of purchase and will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period.
• Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your Apple ID Account Settings after purchase.
• Privacy Policy: https://tozapp.tech/privacy
• Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Rankings

- #1,788,403 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6756535612)