ARN vs polymachine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ARN
Read full descriptionHide full description
ARN-Music 3 shows you all the triads of any musical scale in an innovative way. Perfect for studying and applying chords and harmonizations. Thanks to the dedicated Circle of Fifths for each scale, you can easily create harmonious chord progressions. Choose between degrees or notes by selecting your preferred tonic.
polymachine
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.
- Geometric music theory integration
- Modular synthesis engine
- Generative algorithmic drums
- Oscillators and harmonies
- 808 and kick drum linking
- Log drum pattern generator
Read full descriptionHide full description
Geometry of Music + Modular Synthesis Powerhouse, Generative Algorithmic Drums + Oscillators and Harmonies. FL Soft Clip and FL Distortion on 808s. 808s tied to Kicks. Log Drum Pattern generator
Screenshots
Verdict
The clearest difference is in-app purchases: ARN at none against polymachine's 2. polymachine's advantage is update cadence (weekly vs every 2 weeks) and iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. polymachine sells 2 one-off in-app purchases. ARN asks for nothing beyond the download.
ARN ships an update every 2 weeks, polymachine weekly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | ARN | polymachine |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.4 (13 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 13 — better |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Paid |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 106 MB |
| Age rating | 4+ | 4+ |
| Developer | Nicolas Augsburger Rossi | Mike Gao |
In-app purchases
ARN
No in-app purchases
polymachine
- Sound Expansion$1.99
- Pro Features$34.99
