# polymachine vs Harmonaut

The clearest difference is rating: Harmonaut at 5.0 against polymachine's 3.4. Harmonaut also leads on review sentiment (100% vs 67%) and monetization model (free with in-app purchases vs paid). polymachine's advantage is iOS requirement (15.0 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. polymachine sells 2 one-off in-app purchases and Harmonaut sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Harmonaut holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 13 and 7 respectively. Written reviews point the same way: 67% of polymachine's written reviews are positive against 100% of Harmonaut's.

polymachine ships an update weekly, Harmonaut every 9 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | polymachine | Harmonaut |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (13 ratings)](https://appshunter.io/ios/app/polymachine/id6761276852/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/harmonaut/id6784680994/reviews)** |
| Number of ratings | **13** | 7 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 106 MB | 117 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mike Gao](https://appshunter.io/developer/384844113) | [District One Mobile, LLC](https://appshunter.io/developer/812513884) |

## What reviewers say

### polymachine

[App page](https://appshunter.io/ios/app/polymachine/id6761276852)

This app offers a unique approach to music creation by combining geometric principles with modular synthesis. Explore generative algorithmic drums, oscillators, and harmonies, with specialized tools for 808s and kick drum integration.

**Highlights:** Geometric music theory integration, Modular synthesis engine, Generative algorithmic drums, Oscillators and harmonies, 808 and kick drum linking, Log drum pattern generator

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound Expansion | $1.99 | one-time |
| Pro Features | $34.99 | one-time |


### Harmonaut

[App page](https://appshunter.io/ios/app/harmonaut/id6784680994)

Create music by feel without needing music theory. This app generates rich chords and smooth progressions, allowing you to shape the mood with intuitive controls. Save and reorder your musical ideas effortlessly.

**Highlights:** Play by feel, no theory required, Shape mood with tension and brightness faders, Smooth voice leading for flowing progressions, Chords named for musicians, Save and reorder progressions, Works on iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Harmonaut Pro | $9.99 | one-time |


## Frequently asked questions

### Is polymachine free?

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

### Is Harmonaut free?

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

### Which has better reviews, polymachine or Harmonaut?

Harmonaut is rated higher. polymachine averages 3.4 out of 5 from 13 ratings, while Harmonaut averages 5.0 from 7 ratings.

### Do polymachine or Harmonaut have ads?

Neither polymachine nor Harmonaut shows ads.

### Which is updated more often, polymachine or Harmonaut?

polymachine ships an update weekly, and Harmonaut every 9 days. Most recently, polymachine was updated on October 31, 2026 and Harmonaut on October 25, 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.*