# Audio Function Generator vs Granula Synth

The clearest difference is review sentiment: Audio Function Generator at 77% against Granula Synth's 20%. Audio Function Generator also leads on rating (4.7 vs 1.8) and update cadence (every 6 weeks vs every 25 months). Granula Synth's advantage is 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 Granula Synth sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Audio Function Generator holds the better App Store score, 4.7 against 1.8. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 77% of Audio Function Generator's written reviews are positive against 20% of Granula Synth's.

Audio Function Generator ships an update every 6 weeks, Granula Synth every 25 months. The most recent releases landed on September 24, 2026 and July 10, 2026 respectively.

## The numbers

| Metric | Audio Function Generator | Granula Synth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/audio-function-generator/id768229610/reviews)** | [1.8 (4 ratings)](https://appshunter.io/ios/app/granula-synth/id1624549704/reviews) |
| Number of ratings | **2.2K** | 4 |
| Positive reviews | **77.1% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 25 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 14 MB | 75 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


### Granula Synth

[App page](https://appshunter.io/ios/app/granula-synth/id1624549704)

Explore new soundscapes by manipulating granular audio. This app offers a library of presets, custom sound import, and extensive parameter adjustments for unique music creation. Save your settings and share your sonic experiments.

**Highlights:** Granular sound manipulation, Preset library, Custom sound import, Parameter adjustment, Save user settings, Share audio recordings

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access to app features | $2.99 | per month |
| Access to app features | $7.49 | per 3 months |
| Access to app features | $8.99 | per 6 months |


## Frequently asked questions

### Is Audio Function Generator free?

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

### Is Granula Synth free?

Granula Synth is free to download, with in-app purchases available.

### Which has better reviews, Audio Function Generator or Granula Synth?

Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Granula Synth averages 1.8 from 4 ratings.

### Do Audio Function Generator or Granula Synth have ads?

Neither Audio Function Generator nor Granula Synth shows ads.

### Which is updated more often, Audio Function Generator or Granula Synth?

Audio Function Generator ships an update every 6 weeks, and Granula Synth every 25 months. Most recently, Audio Function Generator was updated on September 24, 2026 and Granula Synth on July 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.*