# Audio Function Generator vs Noise Guru

The clearest difference is in-app purchases: Noise Guru at none against Audio Function Generator's 1. Noise Guru also leads on review sentiment (88% vs 77%). Audio Function Generator's advantage is ratings volume (2.2K vs 299). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Noise Guru asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.6 for Noise Guru. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 299, so its average is the more settled of the two. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 88% of Noise Guru's.

Audio Function Generator ships an update every 6 weeks, Noise Guru monthly. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | Noise Guru |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | [4.6 (299 ratings)](https://appshunter.io/ios/app/noise-guru-decibel-meter/id6444836813/reviews) |
| Number of ratings | **2.2K** | 299 |
| Positive reviews | 77.1% of reviews | **88.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 15 MB |
| Requires iOS | 15.5 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Andrei Serykh](https://appshunter.io/developer/1626886894) |

## 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


### Noise Guru

[App page](https://appshunter.io/ios/app/noise-guru-decibel-meter/id6444836813)

Measure sound levels with precision to understand your environment and protect your hearing. Identify loud noises, monitor noise pollution, and find quiet spaces for recording. Features include a decibel dosimeter, background noise measurement, and geo-tagged recordings.

**Highlights:** Precise sound level metering (SPL), DB Dosimeter for noise exposure tracking, Background noise measurement, Noise pollution monitoring, Geo-tagged noise recordings, Unlimited recording duration

**In-app purchases:** none

**What reviewers like**

- 👍 Effective tool
- 👍 Clean interface
- 👍 Allows measuring loudness
- 👍 Visually appealing and easy to use
- 👍 Efficient and effective

**What reviewers complain about**

- 🐛 Accuracy issues compared to other apps
- 🔋 Can't play audio while using the app

**Reported bugs**

- Forced to leave a review to use the app
- Can't delete max values

**Requested features**

- Add frequency meter
- Add option to reset max/min values


## Frequently asked questions

### Is Audio Function Generator free?

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

### Is Noise Guru free?

Noise Guru is free to download, with no in-app purchases.

### Which has better reviews, Audio Function Generator or Noise Guru?

Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Noise Guru averages 4.6 from 299 ratings.

### Do Audio Function Generator or Noise Guru have ads?

Neither Audio Function Generator nor Noise Guru shows ads.

### Which is updated more often, Audio Function Generator or Noise Guru?

Audio Function Generator ships an update every 6 weeks, and Noise Guru monthly. Most recently, Audio Function Generator was updated on September 24, 2026 and Noise Guru on September 10, 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.*