# Chordindex — Live chord dictionary

> Live chord dictionary (iPhone/iPad app by Nguyen Nguyen.)

- Source: https://appshunter.io/ios/app/chordindex/id6811369735 (this page in markdown: same URL + `.md`)
- Developer: [Nguyen Nguyen](https://appshunter.io/developer/1071455830)
- Category: Music
- Price: $0.99
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English
- Released: 2026-09-18
- Data updated: 2026-10-04
- User reviews in markdown: https://appshunter.io/ios/app/chordindex/id6811369735/reviews.md

## What is Chordindex?

Play a chord. See the name.

Chordindex listens to whatever you're playing — a MIDI keyboard, the on-screen piano, or the on-screen fretboard — and names it in under a second: the name a musician would say in rehearsal, plus two to six alternate names when they apply. Triads, sixths, sevenths, adds, extensions, altered chords, slash chords and inversions — all identified live, spelled for whatever key you're playing in.

Every chord shows the same way on three instruments at once: grand staff, piano, and guitar fretboard. Play a shape on the fretboard and see it on the piano; play a chord on your MIDI keyboard and watch the staff and fretboard follow along.

It's also a reverse dictionary. Look up a chord by name and see its tones, its common aliases, a piano voicing, a guitar diagram, and the staff — no instrument required.

FEATURES

• Live identification: triads, sixths, sevenths, adds, extensions, alters, slash chords
• Two to six alternate names, ranked for what a musician would actually call it
• Grand staff, piano, and fretboard views of the same notes, always in sync
• Reverse lookup: search by name, see the voicing
• Rootless mode for the voicings your left hand would actually use
• Sustain pedal support (CC64), so held chords stay named after you release the keys
• Works with USB MIDI, Bluetooth MIDI, and other apps' virtual MIDI output
• No MIDI keyboard? The on-screen piano and fretboard work standalone
• iPad teaching layout with all three views on screen together; a focused, stacked layout on iPhone
• Light and dark themes

PRIVACY

Chordindex works offline. No account, no analytics, no microphone. MIDI is read only — the app never mutes, routes, or captures your instrument's actual sound.

Chordindex is an independent app. It is not affiliated with any other chord product.


## Version history (last 1 release)

### 1.0 — 2026-09-18

No release notes.

## More apps by Nguyen Nguyen

- [Square 'em All](https://appshunter.io/ios/app/square-em-all/id1071455831)
- [Whitez Blocks](https://appshunter.io/ios/app/whitez-blocks/id1113236583)
- [Game Scoresheet](https://appshunter.io/ios/app/game-scoresheet/id1175735678)
- [Four Blocks!](https://appshunter.io/ios/app/four-blocks/id1216643732)
- [Tính Thuế TNCN](https://appshunter.io/ios/app/tinh-thue-tncn/id1240884553)
- [Shell Keyboard](https://appshunter.io/ios/app/shell-keyboard/id6811290737)

All apps by Nguyen Nguyen: https://appshunter.io/developer/1071455830

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-04.*