# keyOfMusic vs Harmonius

The clearest difference is price: Harmonius at Free against keyOfMusic's $0.99. keyOfMusic's advantage is iOS requirement (15.2 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | keyOfMusic | Harmonius |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/keyofmusic/id6472669515/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Paid | — |
| Size | 37 MB | 152 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jack McCormack](https://appshunter.io/developer/1658121467) | [Lorenzo Brown](https://appshunter.io/developer/1496868083) |

## What reviewers say

### keyOfMusic

[App page](https://appshunter.io/ios/app/keyofmusic/id6472669515)

This app provides a virtual piano keyboard to generate musical notes and display corresponding notation. It helps users practice perfect pitch, sight-reading, and understand key signatures, scales, and octaves. It also includes a feature to import and display sheet music images.

**Highlights:** Virtual piano keyboard with note generation, Display musical notation for played notes, Select key signatures, scales, and octaves, Toggle between flats and sharps, Import, save, and display sheet music images, Adjustable sheet music image size

**Features:** macOS Compatibility

**In-app purchases:** none


### Harmonius

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is keyOfMusic free?

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

### Is Harmonius free?

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

### Do keyOfMusic or Harmonius have ads?

Neither keyOfMusic nor Harmonius 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.*