# Midiflow Transposer (Audiobus) vs MIDI Tools

The clearest difference is price: Midiflow Transposer (Audiobus) at Free against MIDI Tools's $4.99. Midiflow Transposer (Audiobus) also leads on device support (3 vs 1). MIDI Tools's advantage is review sentiment (70% vs 33%) and rating (4.7 vs 4.3). On ads, in-app purchases and iOS requirement there is nothing between them.

Midiflow Transposer (Audiobus) is free to download; MIDI Tools costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MIDI Tools holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 7 and 22 respectively. Written reviews point the same way: 33% of Midiflow Transposer (Audiobus)'s written reviews are positive against 70% of MIDI Tools's.

Midiflow Transposer (Audiobus) ships an update every 9 months, MIDI Tools every 4 days. Both last shipped on November 2, 2026.

## The numbers

| Metric | Midiflow Transposer (Audiobus) | MIDI Tools |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/midiflow-transposer-audiobus/id1175575102/reviews) | **[4.7 (22 ratings)](https://appshunter.io/ios/app/midi-tools/id1446209019/reviews)** |
| Number of ratings | 7 | **22** |
| Positive reviews | 33.3% of reviews | **70.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 days** |
| Monetization | **Free** | Paid |
| Size | 5 MB | 11 MB |
| Requires iOS | **10.2** | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Doerr](https://appshunter.io/developer/622204117) | [Victor Porof](https://appshunter.io/developer/1446209018) |

## What reviewers say

### Midiflow Transposer (Audiobus)

[App page](https://appshunter.io/ios/app/midiflow-transposer-audiobus/id1175575102)

This MIDI effect app for Audiobus 3 lets you transpose notes by octaves and half-tones. It's useful for playing external keyboards in different keys or creating harmonies. The app is free to use.

**Highlights:** Transpose notes by half-tones, Transpose notes by octaves, Create harmonies, Use multiple instances in Audiobus, Essential MIDI effect

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

**In-app purchases:** none


### MIDI Tools

[App page](https://appshunter.io/ios/app/midi-tools/id1446209019)

This application provides a suite of MIDI audio units for iOS, allowing users to manipulate MIDI messages within their DAW's effects chain. It offers tools for altering velocity, transposing keys, monitoring events, and routing MIDI to external hardware or internal buses.

**Highlights:** MIDI message manipulation within DAW effects chains, 8 AUv3 MIDI audio units, Velocity and aftertouch alteration, Key transposition and range restriction, MIDI event monitoring and reporting, Tempo-synced trigger blocking, External and internal MIDI routing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Midiflow Transposer (Audiobus) free?

Midiflow Transposer (Audiobus) is free to download, with no in-app purchases.

### Is MIDI Tools free?

MIDI Tools costs $4.99, with no in-app purchases.

### Which has better reviews, Midiflow Transposer (Audiobus) or MIDI Tools?

MIDI Tools is rated higher. Midiflow Transposer (Audiobus) averages 4.3 out of 5 from 7 ratings, while MIDI Tools averages 4.7 from 22 ratings.

### Do Midiflow Transposer (Audiobus) or MIDI Tools have ads?

Neither Midiflow Transposer (Audiobus) nor MIDI Tools shows ads.

### Which is updated more often, Midiflow Transposer (Audiobus) or MIDI Tools?

Midiflow Transposer (Audiobus) ships an update every 9 months, and MIDI Tools every 4 days. Most recently, Midiflow Transposer (Audiobus) was updated on November 2, 2026 and MIDI Tools on November 2, 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.*