# POLYMACHINE vs Auris

The clearest difference is price: POLYMACHINE at Free against Auris's $4.99. POLYMACHINE also leads on iOS requirement (15.0 vs 17.0). Auris's advantage is in-app purchases (none vs 5) and ads (none vs shown). On update cadence and device support there is nothing between them.

POLYMACHINE is free to download; Auris costs $4.99 up front. POLYMACHINE sells 5 one-off in-app purchases. Auris asks for nothing beyond the download.

POLYMACHINE ships an update every 5 days, Auris weekly. The most recent releases landed on November 9, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | POLYMACHINE | Auris |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[3.6 (18 ratings)](https://appshunter.io/ios/app/polymachine/id6761276852/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 116 MB | 8 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) | [Furkan Alp Gunay](https://appshunter.io/developer/6792704661) |

## 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 |


### Auris

[App page](https://appshunter.io/ios/app/auris-ear-training-and-theory/id6814633571)

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

**In-app purchases:** none


## Frequently asked questions

### Is POLYMACHINE free?

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

### Is Auris free?

Auris costs $4.99, with no in-app purchases.

### Do POLYMACHINE or Auris have ads?

POLYMACHINE shows ads; Auris does not.

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

POLYMACHINE ships an update every 5 days, and Auris weekly. Most recently, POLYMACHINE was updated on November 9, 2026 and Auris on November 6, 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.*