# MuSA_RT vs MIDI FX

The clearest difference is in-app purchases: MuSA_RT at none against MIDI FX's 1. MIDI FX's advantage is update cadence (every 9 days vs every 3 months) and ratings volume (5 vs 1). On price, rating, ads and monetization model there is nothing between them.

Both are free to download. MIDI FX sells 1 one-off in-app purchase. MuSA_RT asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for MuSA_RT against 5.0 for MIDI FX. That said, the two scores are not equally well evidenced: MIDI FX has 5 ratings behind it against 1, so its average is the more settled of the two.

MuSA_RT ships an update every 3 months, MIDI FX every 9 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | MuSA_RT | MIDI FX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/musa-rt/id506866959/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/midi-fx/id1641511918/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 3 MB | 263 MB |
| Requires iOS | 15.6 | **14.7** |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Alexandre Francois](https://appshunter.io/developer/506866962) | [Jorge Arroyo](https://appshunter.io/developer/548989572) |

## What reviewers say

### MuSA_RT

[App page](https://appshunter.io/ios/app/musa-rt/id506866959)

This app visualizes music tonality in 3D using advanced algorithms. It analyzes audio from your microphone to identify chords and keys, displaying them with a rotating camera or in augmented reality.

**Highlights:** 3D tonality visualization, Audio analysis for pitch and context, Chord and key identification, Augmented Reality mode, Smooth camera rotation for unobstructed views

**In-app purchases:** none


### MIDI FX

[App page](https://appshunter.io/ios/app/midi-fx/id1641511918)

This app allows you to control and process MIDI signals for music creation. It offers features like harmonization, transposition, and sequencing, enabling you to control external or virtual synthesizers and create complex musical arrangements.

**Highlights:** MIDI signal processing, Harmonize and Transpose, Sequencer for synths, Delay and Looper, Filter notes by velocity, Internal instruments

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock app | $9.99 | one-time |


## Frequently asked questions

### Is MuSA_RT free?

MuSA_RT is free to download, with no in-app purchases.

### Is MIDI FX free?

MIDI FX is free to download, with in-app purchases available.

### Which has better reviews, MuSA_RT or MIDI FX?

MuSA_RT and MIDI FX are both rated 5.0 out of 5 on the App Store, from 1 and 5 ratings respectively.

### Do MuSA_RT or MIDI FX have ads?

Neither MuSA_RT nor MIDI FX shows ads.

### Which is updated more often, MuSA_RT or MIDI FX?

MuSA_RT ships an update every 3 months, and MIDI FX every 9 days. Most recently, MuSA_RT was updated on November 1, 2026 and MIDI FX on November 3, 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.*