# Psaltério vs Diatonic Chords by Key

The clearest difference is in-app purchases: Psaltério at none against Diatonic Chords by Key's 1. Psaltério also leads on iOS requirement (9.0 vs 13.6). Diatonic Chords by Key's advantage is update cadence (every 5 days vs every 8 months). On price, 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. Psaltério asks for nothing beyond the download.

Psaltério ships an update every 8 months, Diatonic Chords by Key every 5 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Psaltério | Diatonic Chords by Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/psalterio/id858825872/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 18 MB | 36 MB |
| Requires iOS | **9.0** | 13.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UPASD](https://appshunter.io/developer/858825875) | [Mateus Polonini Cardoso](https://appshunter.io/developer/1530866903) |

## What reviewers say

### Psaltério

[App page](https://appshunter.io/ios/app/psalterio/id858825872)

Access over 150 praise and worship songs commonly used by Adventist youth. This app works offline and allows synchronization of the latest songs and regional camp songbooks.

**Highlights:** Offline song access, Global search functionality, Songbook lists, Favorites feature, Sync latest songs

**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 Psaltério free?

Psaltério 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 Psaltério or Diatonic Chords by Key have ads?

Neither Psaltério nor Diatonic Chords by Key shows ads.

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

Psaltério ships an update every 8 months, and Diatonic Chords by Key every 5 days. Most recently, Psaltério was updated on October 2, 2026 and Diatonic Chords by Key on October 6, 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.*