# Harmonic Analysis vs iRhythm Random

The clearest difference is price: Harmonic Analysis at Free against iRhythm Random's $6.99. Harmonic Analysis also leads on update cadence (every 2 days vs every 10 days). iRhythm Random's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Harmonic Analysis is free to download; iRhythm Random costs $6.99 up front. Harmonic Analysis sells 3 in-app purchases, starting at $3.99 per month. iRhythm Random asks for nothing beyond the download.

Harmonic Analysis ships an update every 2 days, iRhythm Random every 10 days. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Harmonic Analysis | iRhythm Random |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[4.8 (22 ratings)](https://appshunter.io/ios/app/harmonic-analysis-theory/id1366920484/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 10 days |
| Monetization | Freemium | — |
| Size | 84 MB | 300 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Deeryard LLC](https://appshunter.io/developer/966765345) | [Maurizio Salvi](https://appshunter.io/developer/1736599893) |

## What reviewers say

### Harmonic Analysis

[App page](https://appshunter.io/ios/app/harmonic-analysis-theory/id1366920484)

Master music theory with interactive exercises focused on chord and Roman numeral analysis. Practice constructing chords, analyzing progressions, and improving your musical ear through various training modes and customizable settings.

**Highlights:** Chord to Roman numeral training, Chord construction exercises, Chord construction with keyboard, Chord progression analysis, Selectable difficulty levels, Support for inverted chords, Performance reports

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access Monthly | $3.99 | per month |
| Premium Access Yearly | $39.99 | per year |
| One-time Payment | $159.99 | one-time |


### iRhythm Random

[App page](https://appshunter.io/ios/app/irhythm-random/id6479618009)

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

**In-app purchases:** none


## Frequently asked questions

### Is Harmonic Analysis free?

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

### Is iRhythm Random free?

iRhythm Random costs $6.99, with no in-app purchases.

### Do Harmonic Analysis or iRhythm Random have ads?

Neither Harmonic Analysis nor iRhythm Random shows ads.

### Which is updated more often, Harmonic Analysis or iRhythm Random?

Harmonic Analysis ships an update every 2 days, and iRhythm Random every 10 days. Most recently, Harmonic Analysis was updated on October 6, 2026 and iRhythm Random on October 11, 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.*