# Audio SA vs ざっくり換算

The clearest difference is in-app purchases: ざっくり換算 at none against Audio SA's 1. ざっくり換算 also leads on update cadence (every 2 months vs every 6 months). Audio SA's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Audio SA sells 1 one-off in-app purchase. ざっくり換算 asks for nothing beyond the download.

Audio SA ships an update every 6 months, ざっくり換算 every 2 months. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Audio SA | ざっくり換算 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 4 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Masayuki Sato](https://appshunter.io/developer/1741867656) |

## What reviewers say

### 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 |


### ざっくり換算

[App page](https://appshunter.io/ios/app/id6738019109)

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

**In-app purchases:** none


## Frequently asked questions

### Is Audio SA free?

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

### Is ざっくり換算 free?

ざっくり換算 is free to download, with no in-app purchases.

### Do Audio SA or ざっくり換算 have ads?

Both Audio SA and ざっくり換算 show ads.

### Which is updated more often, Audio SA or ざっくり換算?

Audio SA ships an update every 6 months, and ざっくり換算 every 2 months. Most recently, Audio SA was updated on October 27, 2026 and ざっくり換算 on October 7, 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.*