# CalmusNotation vs World Controller

The clearest difference is iOS requirement: World Controller at 12 against CalmusNotation's 15.6. On price, update cadence, 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.

CalmusNotation ships an update every 4 months, World Controller every 6 months. The most recent releases landed on June 5, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | CalmusNotation | World Controller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/calmusnotation/id993026661/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Free | — |
| Size | 294 MB | 7 MB |
| Requires iOS | 15.6 | **12** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erki-tonlist sf](https://appshunter.io/developer/929321904) | [Vandalay Industries](https://appshunter.io/developer/1355382384) |

## What reviewers say

### CalmusNotation

[App page](https://appshunter.io/ios/app/calmusnotation/id993026661)

Create and visualize musical compositions using AI-powered graphical notation. This app leverages advanced AI, inspired by NASA's Lisp programming, to generate original music based on user input and can display music from other compatible apps for live performance.

**Highlights:** AI-powered music composition, Graphical notation display, Real-time performance visualization, Lisp-based AI engine, User input-driven music creation, Integration with CalmusComposer and CalmusPlay

**In-app purchases:** none


### World Controller

[App page](https://appshunter.io/ios/app/world-controller/id6468433369)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CalmusNotation free?

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

### Is World Controller free?

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

### Do CalmusNotation or World Controller have ads?

Neither CalmusNotation nor World Controller shows ads.

### Which is updated more often, CalmusNotation or World Controller?

CalmusNotation ships an update every 4 months, and World Controller every 6 months. Most recently, CalmusNotation was updated on June 5, 2026 and World Controller on September 15, 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.*