# Audio Spectrum Viewer vs Toolkit

The clearest difference is price: Toolkit at Free against Audio Spectrum Viewer's $0.99. Toolkit also leads on rating (5.0 vs 4.3) and update cadence (every 10 days vs every 72 months). Audio Spectrum Viewer's advantage is in-app purchases (none vs 3) and ratings volume (4 vs 1). On ads, device support and iOS requirement there is nothing between them.

Toolkit is free to download; Audio Spectrum Viewer costs $0.99 up front. Toolkit sells 3 in-app purchases, starting at $5.99 per month. Audio Spectrum Viewer asks for nothing beyond the download.

Toolkit holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Audio Spectrum Viewer ships an update every 72 months, Toolkit every 10 days. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Audio Spectrum Viewer | Toolkit |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.3 (4 ratings)](https://appshunter.io/ios/app/audio-spectrum-viewer/id1525023447/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/toolkit-toolbox-pro-tools/id6467518699/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 72 months | **Every 10 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 8 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Steve Glenner](https://appshunter.io/developer/1518671062) | [Overflow LTD](https://appshunter.io/developer/1664238457) |

## 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


### Toolkit

[App page](https://appshunter.io/ios/app/toolkit-toolbox-pro-tools/id6467518699)

This app consolidates essential daily productivity tools into a single, minimalist interface. It offers functionalities like QR code scanning and generation, PDF scanning, OCR, currency and unit conversion, and image conversion, eliminating the need for multiple applications.

**Highlights:** QR/Barcode Reader & Generator, PDF Scanner, OCR Text Extraction, Currency Converter, Unit Converter, Image Converter, Text-to-Speech

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $5.99 | per month |
| Yearly | $17.99 | per year |
| Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Audio Spectrum Viewer free?

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

### Is Toolkit free?

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

### Which has better reviews, Audio Spectrum Viewer or Toolkit?

Toolkit is rated higher. Audio Spectrum Viewer averages 4.3 out of 5 from 4 ratings, while Toolkit averages 5.0 from 1 ratings.

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

Neither Audio Spectrum Viewer nor Toolkit shows ads.

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

Audio Spectrum Viewer ships an update every 72 months, and Toolkit every 10 days. Most recently, Audio Spectrum Viewer was updated on October 17, 2026 and Toolkit on October 12, 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.*