# Music By Numbers vs UltimateScale

The clearest difference is in-app purchases: Music By Numbers at none against UltimateScale's 1. Music By Numbers also leads on ads (none vs shown) and update cadence (every 8 days vs every 5 months). UltimateScale's advantage is iOS requirement (14.0 vs 18.0). On price and device support there is nothing between them.

Both are free to download. UltimateScale sells 1 one-off in-app purchase. Music By Numbers asks for nothing beyond the download.

Music By Numbers ships an update every 8 days, UltimateScale every 5 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Music By Numbers | UltimateScale |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/music-by-numbers/id1623018554/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 8 days** | Every 5 months |
| Monetization | Free | — |
| Size | 2 MB | 60 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Timothy Bausch](https://appshunter.io/developer/1608625885) | [Bum Tae Yoon](https://appshunter.io/developer/1578285460) |

## What reviewers say

### Music By Numbers

[App page](https://appshunter.io/ios/app/music-by-numbers/id1623018554)

This application simplifies complex post-tonal music calculations. It allows users to instantly compute matrices and pitch set collections, with options to view detailed set information, rotate, invert, and flip sets. Users can also save and edit their work for future reference.

**Highlights:** Instant matrix and pitch set calculations, View pitch set information on matrix, Rotate, invert, and flip sets, Save and edit matrices and sets, Customizable display for 10 and 11, Customizable colors for PC selection and axis

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

**In-app purchases:** none


### UltimateScale

[App page](https://appshunter.io/ios/app/ultimatescale/id1631310626)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1: Remove all ads | $4.99 | one-time |


## Frequently asked questions

### Is Music By Numbers free?

Music By Numbers is free to download, with no in-app purchases.

### Is UltimateScale free?

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

### Do Music By Numbers or UltimateScale have ads?

UltimateScale shows ads; Music By Numbers does not.

### Which is updated more often, Music By Numbers or UltimateScale?

Music By Numbers ships an update every 8 days, and UltimateScale every 5 months. Most recently, Music By Numbers was updated on November 3, 2026 and UltimateScale 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.*