# piaco - AI Piano Chord Trainer

> AI-powered piano chord trainer with real-time audio feedback and progressive quizzes. (iPhone/iPad app by MINHO JO.)

- Source: https://appshunter.io/ios/app/piaco-ai-piano-chord-trainer/id6756224587 (this page in markdown: same URL + `.md`)
- Developer: [MINHO JO](https://appshunter.io/developer/1823415815)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 12.1 · 254 MB
- Languages: American English
- Released: 2025-12-10
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/piaco-ai-piano-chord-trainer/id6756224587/reviews.md

## What is piaco?

piaco is a chord quiz app that helps you build both chord-reading skills and real playing intuition.
Just play the chord shown on the screen, and the app instantly recognizes the sound and checks your answer.
It turns chord study from theory-only practice into a hands-on experience that uses your eyes, ears, and fingers together.

- Key Features

Real-time chord detection
Play chords like C, Em, or G7, and get instant correctness feedback.

Step-by-step quiz modes
Progress from basic triads to seventh and extended chords with increasing difficulty.

Mistake review
Revisit only the questions you missed to improve accuracy.

Focused practice environment
A clean, simple interface that helps you stay fully concentrated.

- Perfect for

• Players who want to speed up chord reading
• Those who want faster reaction time during real performance
• Learners who know the theory but struggle to play smoothly
• Self-taught pianists learning chord-based playing

With just a few minutes of practice each day, you'll feel chords becoming more natural to read—and your hands responding faster—with piaco.

## Key features

- Real-time chord detection
- Step-by-step quiz modes
- Mistake review
- Focused practice environment
- Instant correctness feedback

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Intensive Training Pack (Lifetime) | $9.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/piaco-ai-piano-chord-trainer/id6756224587/reviews.md

### 5/5 — 제가 딱 원하던 앱인데

*2026-06-21*

최근 반주 코드 배우려고 학원을 다닌데 쌤이 숙제검사 하시면서 코드를 불러 주면 바로 바로 제가 쳐야 되는데 그러다가 보니까 이런 앱을 찾게 되었어요. 너무 너무 좋은데 중간에 광고가 떠서 차라리 돈을 주고 샀으면 좋겠어요. 유로 앱도 만들어 주세요.

### 5/5 — 좋아요

*2026-01-30*

퀴즈처럼 코드가 나오고 치면 바로 넘어가서, 옆에서 레슨 선생님이 확인해주는 것 같아요!

**Developer response:** 좋은 리뷰 정말 감사합니다 😊
실제 레슨처럼 느껴지셨다니 정말 기뻐요. 기능을 잘 활용해주셔서 감사합니다!

## Frequently asked questions about piaco

### What is piaco?

piaco is an AI-powered piano chord trainer that helps you build chord-reading skills and playing intuition. It provides real-time feedback on your chord playing through audio recognition.

### How does piaco detect chords?

piaco uses real-time audio recognition to instantly detect the sound of the chord you play on your piano and checks its correctness against the displayed chord.

### What kind of quizzes does piaco offer?

piaco offers step-by-step quiz modes that allow you to progress from basic triads to more complex seventh and extended chords with increasing difficulty.

### Can piaco help me review mistakes?

Yes, piaco includes a mistake review feature that allows you to revisit only the questions you missed, helping you improve your accuracy.

### Is piaco suitable for self-taught pianists?

Yes, piaco is perfect for self-taught pianists who are learning chord-based playing and want to transition from theory to smooth execution.

### Does piaco have ads?

Yes, piaco contains advertisements, which is common for free applications that offer in-app purchases.

### What devices is piaco available on?

piaco is available on iPhone, iPad, and iPod, making it accessible for a wide range of Apple users.

### How often is piaco updated?

The latest version of piaco is 1.0.11, and it was last updated on June 30, 2026. This indicates a recent update and ongoing development.

## Version history (last 5 releases)

### 1.0.11 — 2026-06-30

Added Remove Ads — a one-time purchase to enjoy the app ad-free, forever.

### 1.0.10 — 2026-06-27

Added Remove Ads — a one-time purchase to enjoy the app ad-free, forever.

### 1.0.9 — 2026-03-07

Improved Piaco AI performance for faster and more accurate chord recognition

### 1.0.8 — 2026-02-05

Now you can immediately retry the questions you missed after a quiz.
Master your weak spots with the new "Similar Questions" feature.

### 1.0.7 — 2026-01-10

- Fixed an issue where chord questions were not visible when the timer was enabled in landscape mode.

## Apps similar to piaco

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Piano Chord Memorization](https://appshunter.io/ios/app/piano-chord-memorization/id1591588836) | 4.8 (23) | Free | Music |
| [Keytionary: Chords & Voicings](https://appshunter.io/ios/app/keytionary-chords-and-voicings/id6768299362) | 4.0 (1) | Free | Music |
| [Chords Pad](https://appshunter.io/ios/app/chords-pad/id1462256877) | 4.8 (88) | Free | Music |
| [Chords: intervals and scales](https://appshunter.io/ios/app/chords-intervals-and-scales/id1545373465) | 4.6 (56) | Free | Music |
| [vivo - Piano Sight Reading](https://appshunter.io/ios/app/vivo-piano-sight-reading/id6446618017) | 5.0 (1) | Free | Music |
| [Piano Chords Master](https://appshunter.io/ios/app/piano-chords-master/id1068547064) | 4.5 (66) | Free | Music |

## More apps by MINHO JO

- [밥먹고십분걷기](https://appshunter.io/ios/app/id6747921969)
- [dateyomi-Master Japanese Dates](https://appshunter.io/ios/app/dateyomi-master-japanese-dates/id6759133325)
- [guico- AI Guitar Chord Trainer](https://appshunter.io/ios/app/guico-ai-guitar-chord-trainer/id6759184000)
- [katayomi - Master Katakana](https://appshunter.io/ios/app/katayomi-master-katakana/id6790161106)

All apps by MINHO JO: https://appshunter.io/developer/1823415815

## Related topics

[chord trainer](https://appshunter.io/ios/topics/chord-trainer) · [piano chord trainer](https://appshunter.io/ios/topics/piano-chord-trainer)

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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 2026-08-25.*