# Audio Spectrum Viewer vs Calccis

The clearest difference is price: Calccis at Free against Audio Spectrum Viewer's $0.99. Calccis also leads on rating (5.0 vs 4.3) and update cadence (every 3 weeks vs every 72 months). Audio Spectrum Viewer's advantage is ratings volume (4 vs 1). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Calccis is free to download; Audio Spectrum Viewer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calccis 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, Calccis every 3 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Audio Spectrum Viewer | Calccis |
| --- | --- | --- |
| 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/calccis/id6446233205/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 72 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 1 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Steve Glenner](https://appshunter.io/developer/1518671062) | [Jukka Aittola](https://appshunter.io/developer/1676073314) |

## 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


### Calccis

[App page](https://appshunter.io/ios/app/calccis/id6446233205)

This utility app offers advanced calculations using reverse Polish notation. It supports a wide range of functions including trigonometry, logarithms, and matrix operations for real, fractional, and complex numbers. An undo stack allows for up to 100 operations to be reversed.

**Highlights:** Reverse Polish Notation (RPN), Basic arithmetic, Trigonometrical functions (degrees/radians), Logarithm and exponent calculations, Real, fractional, and complex number support, Matrix calculations, Undo/Redo stack (100 operations)

**In-app purchases:** none


## Frequently asked questions

### Is Audio Spectrum Viewer free?

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

### Is Calccis free?

Calccis is free to download, with no in-app purchases.

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

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

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

Neither Audio Spectrum Viewer nor Calccis shows ads.

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

Audio Spectrum Viewer ships an update every 72 months, and Calccis every 3 weeks. Most recently, Audio Spectrum Viewer was updated on November 3, 2026 and Calccis on November 3, 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.*