# Audio Spectrum Viewer vs o46scope

The clearest difference is price: o46scope at Free against Audio Spectrum Viewer's $0.99. o46scope also leads on update cadence (every 6 weeks vs every 72 months) and iOS requirement (13.0 vs 16.6). Audio Spectrum Viewer's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

o46scope is free to download; Audio Spectrum Viewer costs $0.99 up front. o46scope sells 1 in-app purchase, starting at $19.99 per year. Audio Spectrum Viewer asks for nothing beyond the download.

Audio Spectrum Viewer ships an update every 72 months, o46scope every 6 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Audio Spectrum Viewer | o46scope |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/audio-spectrum-viewer/id1525023447/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 72 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 2 MB | 53 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Steve Glenner](https://appshunter.io/developer/1518671062) | [Shinsuke Tsutsui](https://appshunter.io/developer/1707110915) |

## What reviewers say

### Audio Spectrum Viewer

[App page](https://appshunter.io/ios/app/audio-spectrum-viewer/id1525023447)

Visualize the frequency content of your live audio environment with a dynamic waterfall spectrogram. Analyze sound systems, create audio fingerprints of environmental sounds, and save spectrograms with custom captions. Capture audio in the background for simultaneous recording and photography.

**Highlights:** Live audio frequency visualization, Waterfall/spectrogram display, Speaker and sound system analysis, Environmental sound fingerprinting, User-selectable gain and sample rate, Save spectrograms with captions, Save audio clips for playback

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

**In-app purchases:** none


### o46scope

[App page](https://appshunter.io/ios/app/o46scope/id6754371407)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $19.99 | per year |


## Frequently asked questions

### Is Audio Spectrum Viewer free?

Audio Spectrum Viewer costs $0.99, with no in-app purchases.

### Is o46scope free?

o46scope is free to download, with in-app purchases available.

### Do Audio Spectrum Viewer or o46scope have ads?

Neither Audio Spectrum Viewer nor o46scope shows ads.

### Which is updated more often, Audio Spectrum Viewer or o46scope?

Audio Spectrum Viewer ships an update every 72 months, and o46scope every 6 weeks. Most recently, Audio Spectrum Viewer was updated on October 24, 2026 and o46scope on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*