# auGEN X vs Compose Studio Viewer

The clearest difference is price: Compose Studio Viewer at Free against auGEN X's $9.99. auGEN X's advantage is iOS requirement (9.0 vs 16.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Compose Studio Viewer is free to download; auGEN X costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

auGEN X ships an update every 3 months, Compose Studio Viewer every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | auGEN X | Compose Studio Viewer |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/augen-x/id1439844878/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 57 MB | 7 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [auDSPr](https://appshunter.io/developer/1439844877) | [Naoki Chiba](https://appshunter.io/developer/1895372512) |

## What reviewers say

### auGEN X

[App page](https://appshunter.io/ios/app/augen-x/id1439844878)

This app generates a wide variety of audio signals for both creative sound design and precise audio system testing. It features a versatile oscillator, noise generator, and impulse generator, functioning as a standalone app or an AUv3 Audio Unit Extension.

**Highlights:** Full-featured audio oscillator with 4 wave shapes, High-quality noise generator (white and pink), Impulse generator for reverb testing, AUv3 Audio Unit Extension and Stand-Alone App, MIDI In and BPM Sync support, Precise signal control with intuitive UI

**Features:** macOS Compatibility

**In-app purchases:** none


### Compose Studio Viewer

[App page](https://appshunter.io/ios/app/compose-studio-viewer/id6780131972)

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

**In-app purchases:** none


## Frequently asked questions

### Is auGEN X free?

auGEN X costs $9.99, with no in-app purchases.

### Is Compose Studio Viewer free?

Compose Studio Viewer is free to download, with no in-app purchases.

### Do auGEN X or Compose Studio Viewer have ads?

Neither auGEN X nor Compose Studio Viewer shows ads.

### Which is updated more often, auGEN X or Compose Studio Viewer?

auGEN X ships an update every 3 months, and Compose Studio Viewer every 2 months. Most recently, auGEN X was updated on October 24, 2026 and Compose Studio Viewer 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.*