# Chordio vs Quartet 3

The clearest difference is price: Chordio at Free against Quartet 3's $16.99. Chordio also leads on update cadence (every 8 days vs monthly). Quartet 3's advantage is review sentiment (90% vs 62%) and rating (4.7 vs 4.4). On ads, in-app purchases, monetization model and device support there is nothing between them.

Chordio is free to download; Quartet 3 costs $16.99 up front. Chordio sells 10 one-off in-app purchases and Quartet 3 sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Quartet 3 holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 8 and 24 respectively. Written reviews point the same way: 62% of Chordio's written reviews are positive against 90% of Quartet 3's.

Chordio ships an update every 8 days, Quartet 3 monthly. The most recent releases landed on November 11, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Chordio | Quartet 3 |
| --- | --- | --- |
| Price | **Free** | $16.99 |
| Rating | [4.4 (8 ratings)](https://appshunter.io/ios/app/chordio-compose-and-learn-music/id1580214821/reviews) | **[4.7 (24 ratings)](https://appshunter.io/ios/app/quartet-3/id6740534501/reviews)** |
| Number of ratings | 8 | **24** |
| Positive reviews | 61.5% of reviews | **90.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 205 MB | 528 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | iPad, Mac | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [One In A Billion Ltd](https://appshunter.io/developer/479881389) | [UK Music Apps Ltd](https://appshunter.io/developer/579320222) |

## What reviewers say

### Chordio

[App page](https://appshunter.io/ios/app/chordio-compose-and-learn-music/id1580214821)

This music composition and theory app helps musicians explore chords and scales interactively. It offers tools to create, store, and transpose chord progressions, with built-in sounds and MIDI controller support for real-time feedback. Ideal for producers, composers, and educators seeking creative inspiration.

**Highlights:** Chord progression generator, Custom chord creation and editing, MIDI controller integration, Real-time chord name display, Transpose chord progressions, Music theory lessons and quizzes, Printable sheet music export

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Free Chord Pack | Free | one-time |
| Chord Progressions 251 No.1 | $2.99 | one-time |
| Jazz Progressions 01 | $5.99 | one-time |
| Neo-Soul Progressions 01 | $5.99 | one-time |
| Neo-Soul Tunes 01 | $5.99 | one-time |
| RnB Chords No.1 | $5.99 | one-time |
| Classical Progressions 1 | $5.99 | one-time |
| II-V-I Progression | $5.99 | one-time |
| RnB Progressions 01 | $5.99 | one-time |
| Unlock App | $14.99 | one-time |


### Quartet 3

[App page](https://appshunter.io/ios/app/quartet-3/id6740534501)

Enhance your jazz performance and practice with live studio recordings of jazz standards. Mute your instrument to play along, change keys, adjust tempo, and loop sections for focused learning. Features animated chord diagrams and playlist creation for seamless practice sessions.

**Highlights:** Live jazz standards play-along, Mute your instrument, Change key and tempo, Loop sections for practice, Animated chord diagrams, Multi-app playlist creation, Multitrack export

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade song | $0.99 | one-time |
| Buy 10 tokens | $8.99 | one-time |
| Buy 20 tokens | $14.99 | one-time |
| Buy 50 tokens | $22.99 | one-time |
| Upgrade all songs | $39.99 | one-time |

**What reviewers like**

- 👍 Superb tool for drum teachers
- 👍 Huge selection of styles and tempos
- 👍 Ability to mute drums for playing along
- 👍 High-quality audio recordings
- 👍 Intuitive and easy to use interface


## Frequently asked questions

### Is Chordio free?

Chordio is free to download, with in-app purchases available.

### Is Quartet 3 free?

Quartet 3 costs $16.99, and also offers in-app purchases.

### Which has better reviews, Chordio or Quartet 3?

Quartet 3 is rated higher. Chordio averages 4.4 out of 5 from 8 ratings, while Quartet 3 averages 4.7 from 24 ratings.

### Do Chordio or Quartet 3 have ads?

Neither Chordio nor Quartet 3 shows ads.

### Which is updated more often, Chordio or Quartet 3?

Chordio ships an update every 8 days, and Quartet 3 monthly. Most recently, Chordio was updated on November 11, 2026 and Quartet 3 on November 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*