# JavaScript Studio Pro vs SpoolFlux

The clearest difference is price: SpoolFlux at Free against JavaScript Studio Pro's $12.99. SpoolFlux also leads on update cadence (weekly vs every 20 months) and ratings volume (8 vs 1). JavaScript Studio Pro's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 18.6). On rating, ads and in-app purchases there is nothing between them.

SpoolFlux is free to download; JavaScript Studio Pro costs $12.99 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 SpoolFlux. That said, the two scores are not equally well evidenced: SpoolFlux has 8 ratings behind it against 1, so its average is the more settled of the two.

JavaScript Studio Pro ships an update every 20 months, SpoolFlux weekly. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | JavaScript Studio Pro | SpoolFlux |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/javascript-studio-pro/id1533537039/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/spoolflux/id6757957454/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 33 MB | 7 MB |
| Requires iOS | **10.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Arrowat LLC](https://appshunter.io/developer/1358562640) | [Reimar Metzen](https://appshunter.io/developer/1453724835) |

## 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


### SpoolFlux

[App page](https://appshunter.io/ios/app/spoolflux/id6757957454)

Manage NFC tags for 3D printer filament spools with support for various formats like OpenSpool and TigerTag. Features automatic color detection, temperature presets, and a comprehensive filament library. Integrates with the OpenFilament Database.

**Highlights:** Read/write multiple NFC tag formats, Automatic color detection via TD1 device, Customizable temperature presets, Extensive filament and material library, Support for multicolor filaments, Import from OpenFilament Database, Save, load, and export filament data

**In-app purchases:** none


## Frequently asked questions

### Is JavaScript Studio Pro free?

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

### Is SpoolFlux free?

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

### Which has better reviews, JavaScript Studio Pro or SpoolFlux?

JavaScript Studio Pro and SpoolFlux are both rated 5.0 out of 5 on the App Store, from 1 and 8 ratings respectively.

### Do JavaScript Studio Pro or SpoolFlux have ads?

Neither JavaScript Studio Pro nor SpoolFlux shows ads.

### Which is updated more often, JavaScript Studio Pro or SpoolFlux?

JavaScript Studio Pro ships an update every 20 months, and SpoolFlux weekly. Most recently, JavaScript Studio Pro was updated on September 29, 2026 and SpoolFlux on October 5, 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.*