# POLYMACHINE vs Harmonaut

The clearest difference is rating: Harmonaut at 5.0 against POLYMACHINE's 3.5. Harmonaut also leads on ads (none vs shown) and review sentiment (100% vs 86%). POLYMACHINE's advantage is iOS requirement (15.0 vs 17.0). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. POLYMACHINE sells 5 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 3.5. Both are backed by a comparable volume of ratings — 17 and 7 respectively. Written reviews point the same way: 86% of POLYMACHINE's written reviews are positive against 100% of Harmonaut's.

POLYMACHINE ships an update every 5 days, Harmonaut every 9 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | POLYMACHINE | Harmonaut |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (17 ratings)](https://appshunter.io/ios/app/polymachine/id6761276852/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/harmonaut-chord-player/id6784680994/reviews)** |
| Number of ratings | **17** | 7 |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 116 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 analog-modeled filters, a vocal chain, and vocal tuning for music production. It aims to be a game-changer for creating music.

**Highlights:** Analog-modeled filters, Vocal chain processing, Vocal tuning, Music production tools

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound Expansion | $1.99 | one-time |
| Eurorack Sequencer | $9.99 | one-time |
| MIGAMO BRUTUS GERMANIUM | $9.99 | one-time |
| MIGAMO Filters | $12.99 | one-time |
| Pro Features | $34.99 | one-time |


### Harmonaut

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

Create rich musical chord progressions by feel, without music theory. Shape the mood with intuitive faders and export your creations as MIDI for use in any Digital Audio Workstation. Perfect for songwriters and producers looking for a new way to explore musical ideas.

**Highlights:** Play chords by feel, no theory required, Shape chord mood with tension and brightness faders, Build and reorder full chord progressions, Voice-led chords for smooth transitions, Export progressions as MIDI files, Export to iReal Pro format

**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 3.5 out of 5 from 17 ratings, while Harmonaut averages 5.0 from 7 ratings.

### Do POLYMACHINE or Harmonaut have ads?

POLYMACHINE shows ads; Harmonaut does not.

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

POLYMACHINE ships an update every 5 days, and Harmonaut every 9 days. Most recently, POLYMACHINE was updated on November 5, 2026 and Harmonaut on November 5, 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.*