# Spectrolite vs Audio SA

The clearest difference is ads: Spectrolite at none against Audio SA's shown. Audio SA's advantage is review sentiment (100% vs 83%). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Spectrolite sells 1 one-off in-app purchase and Audio SA sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Spectrolite ships an update every 8 months, Audio SA every 6 months. The most recent releases landed on September 23, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Spectrolite | Audio SA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (51 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews)** | — |
| Number of ratings | **51** | — |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 6 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 1 MB | 5 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Waxing Wave](https://appshunter.io/developer/392942046) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### Spectrolite

[App page](https://appshunter.io/ios/app/spectrolite/id1480240180)

This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.

**Highlights:** Real-time spectrogram visualization, Constant-Q, linear, and mel frequency scales, Full human hearing frequency range, Intuitive touch panning and zooming, Adjustable gain, Q, and other parameters, Pro version: grids, scales, spectrum view, tap-to-measure

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


### Audio SA

[App page](https://appshunter.io/ios/app/audio-sa/id6444715596)

This app analyzes audio waveforms to create visual voiceprints as TFFT images. It offers extensive customization for FFT analysis, including adjustable ranges, sizes, scales, and window functions. A simple waveform generator is also included for learning purposes.

**Highlights:** TFFT voiceprint image generation, High-resolution image export, Customizable FFT analysis settings, Adjustable audio waveform analysis range, Simple waveform generator (sine, square, noise), Multiple FFT sizes and window functions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads. | $3.99 | one-time |


## Frequently asked questions

### Is Spectrolite free?

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

### Is Audio SA free?

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

### Do Spectrolite or Audio SA have ads?

Audio SA shows ads; Spectrolite does not.

### Which is updated more often, Spectrolite or Audio SA?

Spectrolite ships an update every 8 months, and Audio SA every 6 months. Most recently, Spectrolite was updated on September 23, 2026 and Audio SA on August 31, 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.*