# ゆらぎlight 1/f vs Audio SA

The clearest difference is in-app purchases: ゆらぎlight 1/f at none against Audio SA's 1. ゆらぎlight 1/f also leads on update cadence (monthly vs every 6 months) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Audio SA sells 1 one-off in-app purchase. ゆらぎlight 1/f asks for nothing beyond the download.

ゆらぎlight 1/f ships an update monthly, Audio SA every 6 months. The most recent releases landed on September 25, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | ゆらぎlight 1/f | Audio SA |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | — | Free with in-app purchases |
| Size | 14 MB | 5 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [takayuki atsumi](https://appshunter.io/developer/1495474977) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### ゆらぎlight 1/f

[App page](https://appshunter.io/ios/app/light-1f/id1509158834)

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

**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 ゆらぎlight 1/f free?

ゆらぎlight 1/f 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 ゆらぎlight 1/f or Audio SA have ads?

Both ゆらぎlight 1/f and Audio SA show ads.

### Which is updated more often, ゆらぎlight 1/f or Audio SA?

ゆらぎlight 1/f ships an update monthly, and Audio SA every 6 months. Most recently, ゆらぎlight 1/f was updated on September 25, 2026 and Audio SA on September 11, 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.*