# GtrLib Chords vs Diatonic Chords by Key

The clearest difference is in-app purchases: GtrLib Chords at none against Diatonic Chords by Key's 1. Diatonic Chords by Key's advantage is ads (none vs shown) and update cadence (every 5 days vs fortnightly). On price and device support there is nothing between them.

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

GtrLib Chords ships an update fortnightly, Diatonic Chords by Key every 5 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | GtrLib Chords | Diatonic Chords by Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.4K ratings)](https://appshunter.io/ios/app/gtrlib-chords/id1394407011/reviews)** | — |
| Number of ratings | **1.4K** | — |
| Positive reviews | 77.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 36 MB |
| Requires iOS | 17.0 | **13.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bijoy Thangaraj](https://appshunter.io/developer/453056920) | [Mateus Polonini Cardoso](https://appshunter.io/developer/1530866903) |

## What reviewers say

### GtrLib Chords

[App page](https://appshunter.io/ios/app/gtrlib-chords/id1394407011)

This app is a comprehensive guitar chord library for players of all skill levels. It offers thousands of chords with multiple voicings, fingerings, and audio demonstrations. Easily search, customize, and export chords for practice, learning, or music production.

**Highlights:** Extensive chord library, Multiple voicings and inversions, Audio demonstrations, Suggested fingerings, Quick search functionality, Export as PNG or MIDI, Left-handed mode

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

**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 GtrLib Chords free?

GtrLib Chords 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 GtrLib Chords or Diatonic Chords by Key have ads?

GtrLib Chords shows ads; Diatonic Chords by Key does not.

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

GtrLib Chords ships an update fortnightly, and Diatonic Chords by Key every 5 days. Most recently, GtrLib Chords was updated on October 29, 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.*