# Audio Function Generator vs Granular Synthesizer

The clearest difference is review sentiment: Audio Function Generator at 77% against Granular Synthesizer's 17%. Granular Synthesizer's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (12.0 vs 15.5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase and Granular Synthesizer sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Audio Function Generator ships an update every 6 weeks, Granular Synthesizer every 3 weeks. The most recent releases landed on September 24, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | Granular Synthesizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | — |
| Number of ratings | **2.2K** | — |
| Positive reviews | **77.1% of reviews** | 16.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 14 MB | 73 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Stanislav Duplinskiy](https://appshunter.io/developer/1529735040) |

## 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


### Granular Synthesizer

[App page](https://appshunter.io/ios/app/granular-synthesizer/id1537443140)

Create unique sounds by manipulating audio granules. This app offers a library of granules, pre-made tracks, and adjustable sound parameters. You can also import your own music and share your creations.

**Highlights:** Granular sound library, Pre-made tracks, Adjustable sound parameters, Import from iTunes, Record and share functionality

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound recording | $8.99 | one-time |
| All loops | $12.99 | one-time |
| Full pack | $14.99 | one-time |


## Frequently asked questions

### Is Audio Function Generator free?

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

### Is Granular Synthesizer free?

Granular Synthesizer is free to download, with in-app purchases available.

### Do Audio Function Generator or Granular Synthesizer have ads?

Neither Audio Function Generator nor Granular Synthesizer shows ads.

### Which is updated more often, Audio Function Generator or Granular Synthesizer?

Audio Function Generator ships an update every 6 weeks, and Granular Synthesizer every 3 weeks. Most recently, Audio Function Generator was updated on September 24, 2026 and Granular Synthesizer on July 7, 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.*