# Audio Function Generator vs Frequency Sound Generator App

The clearest difference is monetization model: Audio Function Generator at free with in-app purchases against Frequency Sound Generator App's subscription. Audio Function Generator also leads on ads (none vs shown) and rating (4.7 vs 4.5). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase and Frequency Sound Generator App sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Audio Function Generator holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 2.2K and 4.8K respectively. Written reviews point the same way: 77% of Audio Function Generator's written reviews are positive against 66% of Frequency Sound Generator App's.

Audio Function Generator ships an update every 6 weeks, Frequency Sound Generator App every 2 months. Both last shipped on September 24, 2026.

## The numbers

| Metric | Audio Function Generator | Frequency Sound Generator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | [4.5 (4.8K ratings)](https://appshunter.io/ios/app/frequency-sound-generator-app/id1238160553/reviews) |
| Number of ratings | 2.2K | **4.8K** |
| Positive reviews | **77.1% of reviews** | 66.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 14 MB | 36 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Min Ku](https://appshunter.io/developer/1204192873) |

## 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


### Frequency Sound Generator App

[App page](https://appshunter.io/ios/app/frequency-sound-generator-app/id1238160553)

Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.

**Highlights:** Frequency range 1Hz to 25,000Hz, Wave visualization, Adjustable sensitivity, Multiple waveforms (Sine, Square, Sawtooth, Triangle), Custom frequency range, Logarithmic and Linear slider modes

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access Weekly Plan | $5.99 | per 7 days |
| Unlimited Access Yearly Plan | $19.99 | per year |

**What reviewers like**

- 👍 Helpful for tinnitus
- 🚀 Accurate frequency generation
- 🎉 Great for meditation and relaxation
- 💡 Useful for testing speaker systems
- 🔍 Ability to test hearing range

**What reviewers complain about**

- 🐛 Difficulty adjusting precise frequencies
- 🔊 Extremely high frequencies can be painful
- 🔋 Stops playing when screen is locked
- 📢 Excessive ads
- 🤔 Mosquito repellent feature not effective

**Reported bugs**

- Frequency slider is overly sensitive
- Displayed frequency doesn't match actual output
- Inconsistent behavior between 'Play' and 'Mode' buttons

**Requested features**

- Option to save favorite frequencies
- Ability to type in specific frequency values
- Background playback support
- Paid ad-free version


## Frequently asked questions

### Is Audio Function Generator free?

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

### Is Frequency Sound Generator App free?

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

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

Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Frequency Sound Generator App averages 4.5 from 4.8K ratings.

### Do Audio Function Generator or Frequency Sound Generator App have ads?

Frequency Sound Generator App shows ads; Audio Function Generator does not.

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

Audio Function Generator ships an update every 6 weeks, and Frequency Sound Generator App every 2 months. Most recently, Audio Function Generator was updated on September 24, 2026 and Frequency Sound Generator App on September 24, 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.*