# Audio Function Generator PRO vs Sonic Hz Frequency Generator

The clearest difference is review sentiment: Audio Function Generator PRO at 88% against Sonic Hz Frequency Generator's 10%. Audio Function Generator PRO also leads on rating (4.8 vs 4.2) and in-app purchases (none vs 4). Sonic Hz Frequency Generator's advantage is price (Free vs $9.99). On ratings volume, device support and iOS requirement there is nothing between them.

Sonic Hz Frequency Generator is free to download; Audio Function Generator PRO costs $9.99 up front. Sonic Hz Frequency Generator sells 4 in-app purchases, starting at $6.99 per 7 days. Audio Function Generator PRO asks for nothing beyond the download.

Audio Function Generator PRO holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 269 and 107 respectively. Written reviews point the same way: 88% of Audio Function Generator PRO's written reviews are positive against 10% of Sonic Hz Frequency Generator's.

Audio Function Generator PRO ships an update every 6 weeks, Sonic Hz Frequency Generator every 3 months. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Audio Function Generator PRO | Sonic Hz Frequency Generator |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (269 ratings)](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703/reviews)** | [4.2 (107 ratings)](https://appshunter.io/ios/app/sonic-hz-frequency-generator/id1603037697/reviews) |
| Number of ratings | **269** | 107 |
| Positive reviews | **87.9% of reviews** | 10.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 13 MB | 19 MB |
| Requires iOS | **15.5** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [汇杭 钟](https://appshunter.io/developer/1481585840) |

## What reviewers say

### Audio Function Generator PRO

[App page](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703)

Generate various audio test tones, including sine, square, and sawtooth waves. Explore frequency and volume sweeps, custom presets, and different types of noise. Advanced settings allow for fine-tuning signal parameters and creating complex multi-tone sequences.

**Highlights:** Generate sine, square, triangular, and sawtooth tones, Frequency and volume sweep generation, Customizable presets and configurations, Multiple noise types (White, Pink, Violet, etc.), Advanced signal parameter control, Multi-tone and dual function generation

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

**In-app purchases:** none

**What reviewers like**

- ✨ Superb craftsmanship and work
- 🚀 Excellent performance on older devices
- 💡 History feature is a great addition
- 👍 Versatile and powerful app
- 🎶 Great for binaural beats and sound creation

**What reviewers complain about**

- 📉 Linear sweep is useless
- ❓ Missing PWM functionality
- ❓ Missing Terzrauschen (third-octave noise)
- 🐛 Volume button issues
- 🐛 GUI is bad

**Reported bugs**

- Volume button issues (jumps up and down, displays wrong level)
- Update crashes on iPad Air2 when changing screens
- App opens AppStore repeatedly after purchase
- Buttons don't respond, settings don't keep
- Frequencies stick, program is useless

**Requested features**

- Logarithmic sweeps and frequency slider scale
- PWM functionality
- Terzrauschen (third-octave noise)
- Ping-pong sweeps in Multitone windows
- Sweeping of noise/adding noise in Multitone sweep with sweeping bandpass filter


### Sonic Hz Frequency Generator

[App page](https://appshunter.io/ios/app/sonic-hz-frequency-generator/id1603037697)

Generate precise audio tones from 20 Hz to 20,000 Hz with various waveforms. Utilize binaural beats for meditation, sleep, and focus. Also includes a speaker cleaning function to improve audio quality.

**Highlights:** Pure tone generation (20 Hz - 20,000 Hz), Sine, square, sawtooth, triangle waveforms, Binaural beats for sleep, focus, and meditation, Speaker cleaning function, Customizable presets, Background audio playback

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium · Weekly | $6.99 | per 7 days |
| Premium for 1 month | $9.99 | per month |
| Premium for 12 months | $29.99 | per year |
| Premium Version | $69.99 | one-time |


## Frequently asked questions

### Is Audio Function Generator PRO free?

Audio Function Generator PRO costs $9.99, with no in-app purchases.

### Is Sonic Hz Frequency Generator free?

Sonic Hz Frequency Generator is free to download, with in-app purchases available.

### Which has better reviews, Audio Function Generator PRO or Sonic Hz Frequency Generator?

Audio Function Generator PRO is rated higher. Audio Function Generator PRO averages 4.8 out of 5 from 269 ratings, while Sonic Hz Frequency Generator averages 4.2 from 107 ratings.

### Do Audio Function Generator PRO or Sonic Hz Frequency Generator have ads?

Sonic Hz Frequency Generator shows ads; Audio Function Generator PRO does not.

### Which is updated more often, Audio Function Generator PRO or Sonic Hz Frequency Generator?

Audio Function Generator PRO ships an update every 6 weeks, and Sonic Hz Frequency Generator every 3 months. Most recently, Audio Function Generator PRO was updated on September 21, 2026 and Sonic Hz Frequency Generator on September 22, 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.*