# Wavelet Voice Sonogram vs Audio SA

The clearest difference is price: Audio SA at Free against Wavelet Voice Sonogram's $6.99. Audio SA also leads on device support (3 vs 1) and iOS requirement (15.6 vs 26.2). Wavelet Voice Sonogram's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence there is nothing between them.

Audio SA is free to download; Wavelet Voice Sonogram costs $6.99 up front. Audio SA sells 1 one-off in-app purchase. Wavelet Voice Sonogram asks for nothing beyond the download.

Wavelet Voice Sonogram ships an update every 8 months, Audio SA every 6 months. The most recent releases landed on September 26, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Wavelet Voice Sonogram | Audio SA |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 6 months** |
| Monetization | — | Free with in-app purchases |
| Best chart rank | **#190** | — |
| Size | 0 MB | 5 MB |
| Requires iOS | 26.2 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### Wavelet Voice Sonogram

[App page](https://appshunter.io/ios/app/wavelet-voice-sonogram/id1574131130)

**Currently charting:** #190 Top Paid · Utilities (US App Store)

**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 Wavelet Voice Sonogram free?

Wavelet Voice Sonogram costs $6.99, with no in-app purchases.

### Is Audio SA free?

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

### Do Wavelet Voice Sonogram or Audio SA have ads?

Audio SA shows ads; Wavelet Voice Sonogram does not.

### Which is updated more often, Wavelet Voice Sonogram or Audio SA?

Wavelet Voice Sonogram ships an update every 8 months, and Audio SA every 6 months. Most recently, Wavelet Voice Sonogram was updated on September 26, 2026 and Audio SA on August 31, 2026.

---

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