# ARN vs POLYMACHINE

The clearest difference is in-app purchases: ARN at none against POLYMACHINE's 5. ARN also leads on ads (none vs shown). POLYMACHINE's advantage is update cadence (every 5 days vs every 2 weeks) and iOS requirement (15.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. POLYMACHINE sells 5 one-off in-app purchases. ARN asks for nothing beyond the download.

ARN ships an update every 2 weeks, POLYMACHINE every 5 days. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ARN | POLYMACHINE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.5 (17 ratings)](https://appshunter.io/ios/app/polymachine/id6761276852/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | — | Paid |
| Size | 2 MB | 116 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nicolas Augsburger Rossi](https://appshunter.io/developer/1803162820) | [Mike Gao](https://appshunter.io/developer/384844113) |

## What reviewers say

### ARN

[App page](https://appshunter.io/ios/app/arn-music-3/id6743633914)

**Features:** Vision Pro support

**In-app purchases:** none


### 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 (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 |


## Frequently asked questions

### Is ARN free?

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

### Is POLYMACHINE free?

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

### Do ARN or POLYMACHINE have ads?

POLYMACHINE shows ads; ARN does not.

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

ARN ships an update every 2 weeks, and POLYMACHINE every 5 days. Most recently, ARN was updated on October 28, 2026 and POLYMACHINE 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.*