# Audio Function Generator vs SoundMeter Pro 2020

The clearest difference is price: Audio Function Generator at Free against SoundMeter Pro 2020's $149.99. Audio Function Generator also leads on update cadence (every 6 weeks vs every 3 months). SoundMeter Pro 2020's advantage is in-app purchases (none vs 1) and device support (4 vs 2). On ads there is nothing between them.

Audio Function Generator is free to download; SoundMeter Pro 2020 costs $149.99 up front. Audio Function Generator sells 1 one-off in-app purchase. SoundMeter Pro 2020 asks for nothing beyond the download.

Audio Function Generator ships an update every 6 weeks, SoundMeter Pro 2020 every 3 months. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | SoundMeter Pro 2020 |
| --- | --- | --- |
| Price | **Free** | $149.99 |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | — |
| Number of ratings | **2.2K** | — |
| Positive reviews | 77.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 10 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Faber Acoustical, LLC](https://appshunter.io/developer/284781780) |

## 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 | $14.99 | 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


### SoundMeter Pro 2020

[App page](https://appshunter.io/ios/app/soundmeter-pro-2020/id1530068189)

**Features:** Apple Watch app

**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 SoundMeter Pro 2020 free?

SoundMeter Pro 2020 costs $149.99, with no in-app purchases.

### Do Audio Function Generator or SoundMeter Pro 2020 have ads?

Neither Audio Function Generator nor SoundMeter Pro 2020 shows ads.

### Which is updated more often, Audio Function Generator or SoundMeter Pro 2020?

Audio Function Generator ships an update every 6 weeks, and SoundMeter Pro 2020 every 3 months. Most recently, Audio Function Generator was updated on November 1, 2026 and SoundMeter Pro 2020 on October 25, 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.*