# MidiBus vs AUM

The clearest difference is price: MidiBus at $2.99 against AUM's $24.99. MidiBus also leads on in-app purchases (none vs 4) and rating (5.0 vs 4.7). AUM's advantage is ratings volume (535 vs 2) and chart position (#189 vs unranked). On update cadence, ads and device support there is nothing between them.

MidiBus costs $2.99 and AUM $24.99 up front. AUM sells 4 one-off in-app purchases. MidiBus asks for nothing beyond the download.

MidiBus holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: AUM has 535 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 94% of MidiBus's written reviews are positive against 82% of AUM's.

MidiBus ships an update every 5 months, AUM every 3 months. The most recent releases landed on November 1, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | MidiBus | AUM |
| --- | --- | --- |
| Price | **$2.99** | $24.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/midibus/id648856167/reviews)** | [4.7 (535 ratings)](https://appshunter.io/ios/app/aum-audio-mixer/id1055636344/reviews) |
| Number of ratings | 2 | **535** |
| Positive reviews | **93.8% of reviews** | 81.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | — | **#189** |
| Size | 2 MB | 13 MB |
| Requires iOS | **5.1.1** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Audeonic Apps](https://appshunter.io/developer/351607509) | [Kymatica AB](https://appshunter.io/developer/522046659) |

## What reviewers say

### MidiBus

[App page](https://appshunter.io/ios/app/midibus/id648856167)

Synchronize MIDI clock signals between apps and devices with adjustable BPM and time signatures. Monitor the accuracy and stability of MIDI clock sources, including the app itself. Discover surprising performance metrics from your connected gear.

**Highlights:** MIDI clock sync generation, Adjustable BPM and time signature, Multiple MIDI destinations, MIDI clock signal monitoring, Accuracy and stability measurement, iOS MIDI development library based

**Features:** Vision Pro support

**In-app purchases:** none


### AUM

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

**Currently charting:** #189 Top Paid · Music (US App Store)

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 MidiBus free?

MidiBus costs $2.99, with no in-app purchases.

### Is AUM free?

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

### Which has better reviews, MidiBus or AUM?

MidiBus is rated higher. MidiBus averages 5.0 out of 5 from 2 ratings, while AUM averages 4.7 from 535 ratings.

### Do MidiBus or AUM have ads?

Neither MidiBus nor AUM shows ads.

### Which is updated more often, MidiBus or AUM?

MidiBus ships an update every 5 months, and AUM every 3 months. Most recently, MidiBus was updated on November 1, 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.*