# JavaScript Studio Pro vs KQ MIDI Modulate

The clearest difference is price: KQ MIDI Modulate at $5.99 against JavaScript Studio Pro's $12.99. KQ MIDI Modulate also leads on update cadence (fortnightly vs every 20 months) and ratings volume (4 vs 1). JavaScript Studio Pro's advantage is iOS requirement (10.0 vs 15.0). On rating, ads, in-app purchases and monetization model there is nothing between them.

JavaScript Studio Pro costs $12.99 and KQ MIDI Modulate $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for JavaScript Studio Pro against 5.0 for KQ MIDI Modulate. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

JavaScript Studio Pro ships an update every 20 months, KQ MIDI Modulate fortnightly. The most recent releases landed on June 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | JavaScript Studio Pro | KQ MIDI Modulate |
| --- | --- | --- |
| Price | $12.99 | **$5.99** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/javascript-studio-pro/id1533537039/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/kq-midi-modulate/id6479354516/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 33 MB | 2 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arrowat LLC](https://appshunter.io/developer/1358562640) | [Ryouta Kira](https://appshunter.io/developer/862984358) |

## What reviewers say

### JavaScript Studio Pro

[App page](https://appshunter.io/ios/app/javascript-studio-pro/id1533537039)

Develop web applications on your mobile device using JavaScript, CSS, and HTML. This tool offers error checking assistance as you code, ensuring you don't lose track of your ideas. Create and save your projects anywhere, anytime.

**Highlights:** Write JavaScript, CSS, HTML code, Create web applications, Error checking assistance, Save code and ideas, Mobile development environment

**Features:** macOS Compatibility

**In-app purchases:** none


### KQ MIDI Modulate

[App page](https://appshunter.io/ios/app/kq-midi-modulate/id6479354516)

This tool is designed for advanced MIDI users to manipulate and route MIDI signals. It offers extensive control over signal conversion, note triggering, and pad-based MIDI output, including AUv3 plugins. It does not produce sound on its own.

**Highlights:** MIDI signal conversion, 8x16 pad output, Free MIDI device routing, AUv3 plugins included, Note and control signal triggering, Customizable signal filtering

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

**In-app purchases:** none


## Frequently asked questions

### Is JavaScript Studio Pro free?

JavaScript Studio Pro costs $12.99, with no in-app purchases.

### Is KQ MIDI Modulate free?

KQ MIDI Modulate costs $5.99, with no in-app purchases.

### Which has better reviews, JavaScript Studio Pro or KQ MIDI Modulate?

JavaScript Studio Pro and KQ MIDI Modulate are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.

### Do JavaScript Studio Pro or KQ MIDI Modulate have ads?

Neither JavaScript Studio Pro nor KQ MIDI Modulate shows ads.

### Which is updated more often, JavaScript Studio Pro or KQ MIDI Modulate?

JavaScript Studio Pro ships an update every 20 months, and KQ MIDI Modulate fortnightly. Most recently, JavaScript Studio Pro was updated on June 21, 2026 and KQ MIDI Modulate on September 19, 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.*