# Acorde vs Diatonic Chords by Key

The clearest difference is in-app purchases: Acorde at none against Diatonic Chords by Key's 1. Acorde also leads on iOS requirement (10.3 vs 13.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Diatonic Chords by Key sells 1 one-off in-app purchase. Acorde asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Acorde | Diatonic Chords by Key |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Free | — |
| Size | 13 MB | 36 MB |
| Requires iOS | **10.3** | 13.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Orla Digital LTDA](https://appshunter.io/developer/1013485405) | [Mateus Polonini Cardoso](https://appshunter.io/developer/1530866903) |

## What reviewers say

### Acorde

[App page](https://appshunter.io/ios/app/acorde/id1262836837)

Train your guitar chord skills with this application. It presents chords you need to play within a set time, allowing you to adjust the speed for increased difficulty. Improve your chord transitions and reflexes to become a proficient guitarist.

**Highlights:** Chord training, Customizable chord sets, Adjustable tempo, Speed training, Reflex improvement

**Features:** macOS Compatibility

**In-app purchases:** none


### Diatonic Chords by Key

[App page](https://appshunter.io/ios/app/diatonic-chords-by-key/id1533977611)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Campo Harmônico Pro | $2.99 | one-time |


## Frequently asked questions

### Is Acorde free?

Acorde is free to download, with no in-app purchases.

### Is Diatonic Chords by Key free?

Diatonic Chords by Key is free to download, with in-app purchases available.

### Do Acorde or Diatonic Chords by Key have ads?

Neither Acorde nor Diatonic Chords by Key shows ads.

### Which is updated more often, Acorde or Diatonic Chords by Key?

Acorde ships an update every 5 days, and Diatonic Chords by Key every 5 days. Most recently, Acorde was updated on October 24, 2026 and Diatonic Chords by Key on October 25, 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.*