# Diatonic Chords by Key vs StringKit

The clearest difference is iOS requirement: Diatonic Chords by Key at 13.6 against StringKit's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Diatonic Chords by Key sells 1 one-off in-app purchase and StringKit sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Diatonic Chords by Key | StringKit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 36 MB | 1 MB |
| Requires iOS | **13.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mateus Polonini Cardoso](https://appshunter.io/developer/1530866903) | [Enrico Weinhold](https://appshunter.io/developer/1747097035) |

## What reviewers say

### 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 |


### StringKit

[App page](https://appshunter.io/ios/app/stringkit/id6775164270)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support StringKit | $1.99 | one-time |


## Frequently asked questions

### Is Diatonic Chords by Key free?

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

### Is StringKit free?

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

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

Neither Diatonic Chords by Key nor StringKit shows ads.

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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.*