# FFTWave vs Audio SA

The clearest difference is in-app purchases: FFTWave at none against Audio SA's 1. FFTWave also leads on ads (none vs shown) and iOS requirement (11.0 vs 15.6). Audio SA's advantage is review sentiment (100% vs 77%) and update cadence (every 6 months vs every 15 months). On price and device support there is nothing between them.

Both are free to download. Audio SA sells 1 one-off in-app purchase. FFTWave asks for nothing beyond the download.

FFTWave ships an update every 15 months, Audio SA every 6 months. The most recent releases landed on September 17, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | FFTWave | Audio SA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (15 ratings)](https://appshunter.io/ios/app/fftwave/id1080227446/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 76.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 6 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 5 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eisaku Nozu](https://appshunter.io/developer/1080227445) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### FFTWave

[App page](https://appshunter.io/ios/app/fftwave/id1080227446)

Visualize sound from your microphone as a waveform and spectrum analysis. Identify frequency characteristics, detect peaks, and analyze howling with pinch-to-zoom gestures. Ideal for sound adjustment and analysis.

**Highlights:** Microphone waveform display, Spectrum analysis via Fourier transform, Frequency characteristic checking, Peak detection and hold, Pinch zoom gestures, Howling analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 FFTWave free?

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

### Is Audio SA free?

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

### Do FFTWave or Audio SA have ads?

Audio SA shows ads; FFTWave does not.

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

FFTWave ships an update every 15 months, and Audio SA every 6 months. Most recently, FFTWave was updated on September 17, 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.*