# Harmonius vs ChordDeck

The clearest difference is price: Harmonius at Free against ChordDeck's $0.99. ChordDeck's advantage is chart position (#168 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Harmonius is free to download; ChordDeck costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Harmonius | ChordDeck |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chorddeck/id6767094987/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | — | Paid |
| Best chart rank | — | **#168** |
| Size | 152 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lorenzo Brown](https://appshunter.io/developer/1496868083) | [Shinhye Lee](https://appshunter.io/developer/1707333313) |

## What reviewers say

### Harmonius

[App page](https://appshunter.io/ios/app/harmonius/id6499569641)

**Features:** macOS Compatibility

**In-app purchases:** none


### ChordDeck

[App page](https://appshunter.io/ios/app/chorddeck/id6767094987)

**Currently charting:** #168 Top Paid · Music (US App Store)

This app provides jazz chord flashcards for musicians to practice chord recall. It displays chord symbols, tones, formulas, and keyboard highlights, with audio playback. Users can mark difficult cards for later review.

**Highlights:** Practice jazz chord qualities, Circle-of-fourths or random root order, Continuous or one-pass practice sessions, View chord tones, formulas, and keyboard highlights, Built-in audio playback, Mark and review difficult cards, Local storage for settings and marked cards

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

**In-app purchases:** none


## Frequently asked questions

### Is Harmonius free?

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

### Is ChordDeck free?

ChordDeck costs $0.99, with no in-app purchases.

### Do Harmonius or ChordDeck have ads?

Neither Harmonius nor ChordDeck 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.*