# Acchordion — Jazz chord quiz

> Jazz seventh chord learning app that uses microphone input for feedback. (iPhone/iPad app by Oojoo Studio, LLC.)

- Source: https://appshunter.io/ios/app/acchordion/id6736920308 (this page in markdown: same URL + `.md`)
- Developer: [Oojoo Studio, LLC](https://appshunter.io/developer/1711859875)
- Category: Music, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.6 · 0 MB
- Languages: American English
- Released: 2025-05-12
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/acchordion/id6736920308/reviews.md

## What is Acchordion?

Acchordion is a quiz app for learning seventh chords. 

Acchordion works by listening to you play your instrument (or sing) into the microphone of your device and identifying the notes you play. Match all four notes in a chord to move on to the next one. You can filter chords by their root note (e.g. C or A-flat) or by chord family (e.g. major or dominant). 

Why learn seventh chords? 

Seventh chords are the foundation of jazz and are also common in pop music. Knowing seventh chords will help you: 
* read music from a lead sheet
* learn to play new songs more easily 
* make new arrangements of songs you already know
* improvise over a particular song 
* write your own songs

Acchordion is a fun way to learn these chords! It provides immediate feedback, so you can be confident that you’re practicing the right notes. Once you’ve mastered these basic chords, you’ll be ready to play like a pro!

## Key features

- Listens to instrument or vocal input
- Identifies played notes
- Matches four notes in a chord
- Filters chords by root note
- Filters chords by family
- Provides immediate feedback


## Frequently asked questions about Acchordion

### What is Acchordion?

Acchordion is a music quiz app designed to help users learn seventh chords. It utilizes your device's microphone to identify the notes you play or sing, providing instant feedback on your accuracy.

### How does Acchordion work?

You play or sing into your device's microphone, and Acchordion identifies the notes. The app then checks if you've correctly played all four notes of a seventh chord to advance you to the next challenge.

### Can I filter chords in Acchordion?

Yes, Acchordion allows you to filter chords by their root note, such as C or A-flat, or by chord family, like major or dominant seventh chords.

### Why should I learn seventh chords with Acchordion?

Seventh chords are fundamental to jazz and common in pop music. Learning them with Acchordion can improve your ability to read lead sheets, learn songs faster, arrange music, improvise, and write your own compositions.

### Is Acchordion suitable for beginners?

Acchordion is designed to be a fun way to learn essential chords. Its immediate feedback helps ensure you are practicing correctly, making it beneficial for musicians at various stages of their learning journey.

### What devices support Acchordion?

Acchordion is available for iPhone and iPad devices, indicated by its support for these platforms.

### Does Acchordion have ads?

No, Acchordion does not contain advertisements. The app is free to use without any ad interruptions.

### When was Acchordion last updated?

Acchordion was last updated on May 12, 2025, with version 1.0 being released on the same date.

## Version history (last 1 release)

### 1.0 — 2025-05-12

No release notes.

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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 2026-06-04.*