# MuSA_RT vs Note by Note

The clearest difference is update cadence: Note by Note at every 2 weeks against MuSA_RT's every 3 months. MuSA_RT's advantage is device support (4 vs 2) and iOS requirement (15.6 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MuSA_RT ships an update every 3 months, Note by Note every 2 weeks. The most recent releases landed on November 1, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | MuSA_RT | Note by Note |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/musa-rt/id506866959/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 7 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexandre Francois](https://appshunter.io/developer/506866962) | [CGDevworks LLC](https://appshunter.io/developer/1882236775) |

## 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


### Note by Note

[App page](https://appshunter.io/ios/app/note-by-note/id6760000876)

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

**In-app purchases:** none


## Frequently asked questions

### Is MuSA_RT free?

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

### Is Note by Note free?

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

### Do MuSA_RT or Note by Note have ads?

Neither MuSA_RT nor Note by Note shows ads.

### Which is updated more often, MuSA_RT or Note by Note?

MuSA_RT ships an update every 3 months, and Note by Note every 2 weeks. Most recently, MuSA_RT was updated on November 1, 2026 and Note by Note on November 9, 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.*