# Audio Function Generator PRO vs Frequency Generator

The clearest difference is price: Frequency Generator at Free against Audio Function Generator PRO's $9.99. Audio Function Generator PRO's advantage is review sentiment (88% vs 47%) and in-app purchases (none vs 12). On ratings volume, update cadence and device support there is nothing between them.

Frequency Generator is free to download; Audio Function Generator PRO costs $9.99 up front. Frequency Generator sells 12 in-app purchases, starting at $4.99 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 4.4. Both are backed by a comparable volume of ratings — 269 and 471 respectively. Written reviews point the same way: 88% of Audio Function Generator PRO's written reviews are positive against 47% of Frequency Generator's.

Audio Function Generator PRO ships an update every 6 weeks, Frequency Generator every 3 weeks. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Audio Function Generator PRO | Frequency Generator |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (269 ratings)](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703/reviews)** | [4.4 (471 ratings)](https://appshunter.io/ios/app/frequency-generator-hz/id6469028689/reviews) |
| Number of ratings | 269 | **471** |
| Positive reviews | **87.9% of reviews** | 47.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#176** | — |
| Size | 13 MB | 206 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Boss Web SRL](https://appshunter.io/developer/1839514881) |

## What reviewers say

### Audio Function Generator PRO

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

**Currently charting:** #176 Top Paid · Music (US App Store)

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


### Frequency Generator

[App page](https://appshunter.io/ios/app/frequency-generator-hz/id6469028689)

Enhance sleep and focus with scientifically engineered sound frequencies. This app offers customizable modes for deep slumber and peak concentration, utilizing binaural and isochronic beats. Enjoy an intuitive interface and offline access to boost your well-being and productivity.

**Highlights:** Sleep Mode with Delta & Theta frequencies, Focus Mode with Alpha & Beta frequencies, Binaural and Isochronic beats, Customizable duration and volume, User-friendly interface, Offline Mode

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly Subscription | $9.99 | per month |
| Yearly Subscription Discount | $9.99 | per year |
| Yearly Subscription Discount | $19.99 | per year |
| Discount Best Value | $24.99 | per year |
| Yearly with 30 day 50% off | $24.99 | per year |
| Yearly Discount POPULAR | $29.99 | per year |
| Free Trial | $29.99 | per year |
| Yearly Subscription | $39.99 | per year |
| Yearly Subscription | $39.99 | per year |
| Annual Subscription | $39.99 | per year |
| Lifetime | $149.99 | one-time |

**What reviewers like**

- 🚀 Straightforward app
- 🚀 Reliable app
- 🚀 Easy to use
- 🚀 Works just right
- 🚀 Relaxing to use

**What reviewers complain about**

- 🐛 Doesn't work
- 🐛 Timer doesn't work
- 🐛 Unreliable
- 🐛 Stops in background
- 🐛 Wrong numbers displayed

**Reported bugs**

- Timer shuts off after 30 seconds
- Subscription issues
- Free trial doesn't work
- Frequency-Spectrum issues

**Requested features**

- Add AirPlay support
- Increase frequency range up to 15 kHz
- Add more sound options
- Allow custom frequency selection
- Improve user instructions


## Frequently asked questions

### Is Audio Function Generator PRO free?

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

### Is Frequency Generator free?

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

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

Audio Function Generator PRO is rated higher. Audio Function Generator PRO averages 4.8 out of 5 from 269 ratings, while Frequency Generator averages 4.4 from 471 ratings.

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

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

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

Audio Function Generator PRO ships an update every 6 weeks, and Frequency Generator every 3 weeks. Most recently, Audio Function Generator PRO was updated on September 30, 2026 and Frequency Generator on September 29, 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.*