# Audio Function Generator PRO vs AUM

The clearest difference is price: Audio Function Generator PRO at $14.99 against AUM's $24.99. Audio Function Generator PRO also leads on in-app purchases (none vs 4) and update cadence (every 6 weeks vs every 3 months). AUM's advantage is iOS requirement (12.0 vs 16.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

Audio Function Generator PRO costs $14.99 and AUM $24.99 up front. AUM sells 4 one-off in-app purchases. Audio Function Generator PRO asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Audio Function Generator PRO against 4.7 for AUM. Both are backed by a comparable volume of ratings — 271 and 535 respectively. Written reviews are what separate them: 88% of Audio Function Generator PRO's written reviews are positive against 82% of AUM's.

Audio Function Generator PRO ships an update every 6 weeks, AUM every 3 months. Both last shipped on November 11, 2026.

## The numbers

| Metric | Audio Function Generator PRO | AUM |
| --- | --- | --- |
| Price | **$14.99** | $24.99 |
| Rating | **[4.8 (271 ratings)](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703/reviews)** | [4.7 (535 ratings)](https://appshunter.io/ios/app/aum-audio-mixer/id1055636344/reviews) |
| Number of ratings | 271 | **535** |
| Positive reviews | **87.9% of reviews** | 81.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 13 MB | 13 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Kymatica AB](https://appshunter.io/developer/522046659) |

## What reviewers say

### Audio Function Generator PRO

[App page](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703)

Generate various audio test tones, including sine, square, and sawtooth waves. Explore frequency and volume sweeps, custom presets, and different types of noise. Advanced settings allow for fine-tuning signal parameters and creating complex multi-tone sequences.

**Highlights:** Generate sine, square, triangular, and sawtooth tones, Frequency and volume sweep generation, Customizable presets and configurations, Multiple noise types (White, Pink, Violet, etc.), Advanced signal parameter control, Multi-tone and dual function generation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✨ Superb craftsmanship and work
- 🚀 Excellent performance on older devices
- 💡 History feature is a great addition
- 👍 Versatile and powerful app
- 🎶 Great for binaural beats and sound creation

**What reviewers complain about**

- 📉 Linear sweep is useless
- ❓ Missing PWM functionality
- ❓ Missing Terzrauschen (third-octave noise)
- 🐛 Volume button issues
- 🐛 GUI is bad

**Reported bugs**

- Volume button issues (jumps up and down, displays wrong level)
- Update crashes on iPad Air2 when changing screens
- App opens AppStore repeatedly after purchase
- Buttons don't respond, settings don't keep
- Frequencies stick, program is useless

**Requested features**

- Logarithmic sweeps and frequency slider scale
- PWM functionality
- Terzrauschen (third-octave noise)
- Ping-pong sweeps in Multitone windows
- Sweeping of noise/adding noise in Multitone sweep with sweeping bandpass filter


### AUM

[App page](https://appshunter.io/ios/app/aum-audio-mixer/id1055636344)

This app is a versatile audio mixer, recorder, and connection hub for mobile devices. It allows users to connect various audio sources, route signals, apply effects, and record mixes with high fidelity. It supports advanced features like MIDI control, synchronization, and integration with other audio apps and hardware.

**Highlights:** Connect hardware inputs/outputs, Route audio and MIDI, Host Audio Unit extensions, Record mixes and individual tracks, Synchronize with Ableton Link, Built-in processing nodes, MIDI control and routing

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Huge Tip | $9.99 | one-time |

**What reviewers like**

- 👍 Excellent audio routing and mixing capabilities
- 🚀 Powerful and flexible workflow
- 💡 Seamless integration with AUv3 and IAA apps
- 👍 Intuitive and clean user interface
- 👍 Reliable and stable performance

**What reviewers complain about**

- 🐛 Occasional crashes or stability issues
- 💡 Lack of MIDI clock sync receive functionality
- 💡 Limited visual customization options (e.g. channel sizes)
- 🐛 Compatibility issues with some hardware interfaces

**Reported bugs**

- Crashes or freezes when using certain plugin combinations
- Compatibility issues with iOS 15 and newer
- Inconsistent MIDI transport controls

**Requested features**

- Add MIDI clock sync receive capability
- Implement a timeline/sequencer view
- Provide more visual customization options
- Improve support for external hardware integration


## Frequently asked questions

### Is Audio Function Generator PRO free?

Audio Function Generator PRO costs $14.99, with no in-app purchases.

### Is AUM free?

AUM costs $24.99, and also offers in-app purchases.

### Which has better reviews, Audio Function Generator PRO or AUM?

Audio Function Generator PRO is rated higher. Audio Function Generator PRO averages 4.8 out of 5 from 271 ratings, while AUM averages 4.7 from 535 ratings.

### Do Audio Function Generator PRO or AUM have ads?

Neither Audio Function Generator PRO nor AUM shows ads.

### Which is updated more often, Audio Function Generator PRO or AUM?

Audio Function Generator PRO ships an update every 6 weeks, and AUM every 3 months. Most recently, Audio Function Generator PRO was updated on November 11, 2026 and AUM on November 11, 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.*