# Audio Function Generator vs Tuning Fork Pro 20

The clearest difference is rating: Audio Function Generator at 4.7 against Tuning Fork Pro 20's 3.0. Audio Function Generator also leads on ratings volume (2.2K vs 2). Tuning Fork Pro 20's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Tuning Fork Pro 20 asks for nothing beyond the download.

Audio Function Generator holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 2, so its average is the more settled of the two.

Audio Function Generator ships an update every 6 weeks, Tuning Fork Pro 20 weekly. The most recent releases landed on September 26, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | Tuning Fork Pro 20 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/tuning-fork-pro-20-20000hz/id6529535310/reviews) |
| Number of ratings | **2.2K** | 2 |
| Positive reviews | 77.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 6 MB |
| Requires iOS | 15.5 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Krzysztof Gwiazda](https://appshunter.io/developer/1546740383) |

## What reviewers say

### Audio Function Generator

[App page](https://appshunter.io/ios/app/audio-function-generator/id768229610)

Generate various audio test tones, including sine, square, triangle, and sawtooth waves. Explore frequency and volume sweeps, noise generation, and custom preset creation. Advanced features like extended frequency ranges and multi-tone playback are available with an upgrade.

**Highlights:** Generate sine, square, triangle, and sawtooth tones, Frequency and volume sweep generation, Noise generation (white, pink, violet, etc.), Custom preset creation and saving, Extended frequency range (PRO feature), Multi-tone playback (PRO feature)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to PRO | $9.99 | one-time |

**What reviewers like**

- 👍 Great app
- 🎶 Helps with Tinnitus
- 💯 Best app I've paid for
- 🔍 Highly recommended
- 🎨 Attention to detail

**What reviewers complain about**

- 🐛 Crashes
- 💰 Deceptive/Money hungry
- 🔒 Basic features paywalled
- 🔒 Limited without paying
- 🔒 Removed functionality to push paid version

**Reported bugs**

- Crashes on launch
- Volume slider issues
- Airplay not working
- Sound distortion when display is active

**Requested features**

- Add download/save feature for custom sounds
- Improve sweep function (continuous mode, better frequency control)
- Add more multi-frequency rows
- Implement 432Hz base frequency option
- Add phase control for noise generators


### Tuning Fork Pro 20

[App page](https://appshunter.io/ios/app/tuning-fork-pro-20-20000hz/id6529535310)

This utility app provides a simple and straightforward tuning fork. It allows users to generate any frequency between 20 Hz and 20,000 Hz, limited only by the device's speaker and human hearing.

**Highlights:** Adjustable frequency range (20 Hz - 20,000 Hz), Simple and easy to use interface, Generates audio tones, No complex settings

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

**In-app purchases:** none


## Frequently asked questions

### Is Audio Function Generator free?

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

### Is Tuning Fork Pro 20 free?

Tuning Fork Pro 20 is free to download, with no in-app purchases.

### Which has better reviews, Audio Function Generator or Tuning Fork Pro 20?

Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Tuning Fork Pro 20 averages 3.0 from 2 ratings.

### Do Audio Function Generator or Tuning Fork Pro 20 have ads?

Neither Audio Function Generator nor Tuning Fork Pro 20 shows ads.

### Which is updated more often, Audio Function Generator or Tuning Fork Pro 20?

Audio Function Generator ships an update every 6 weeks, and Tuning Fork Pro 20 weekly. Most recently, Audio Function Generator was updated on September 26, 2026 and Tuning Fork Pro 20 on September 5, 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.*