# Algo Demo vs JavaScript Compiler(Pro)

The clearest difference is price: Algo Demo at Free against JavaScript Compiler(Pro)'s $2.99. Algo Demo also leads on update cadence (every 4 months vs every 7 months). JavaScript Compiler(Pro)'s advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Algo Demo is free to download; JavaScript Compiler(Pro) costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Algo Demo ships an update every 4 months, JavaScript Compiler(Pro) every 7 months. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Algo Demo | JavaScript Compiler(Pro) |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 7 months |
| Size | 36 MB | 62 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [zhuo zeng](https://appshunter.io/developer/1435764582) | [Hrishi Suthar](https://appshunter.io/developer/1660005858) |

## What reviewers say

### Algo Demo

[App page](https://appshunter.io/ios/app/algo-demo/id6746090108)

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

**In-app purchases:** none


### JavaScript Compiler(Pro)

[App page](https://appshunter.io/ios/app/javascript-compilerpro/id6747161212)

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

**In-app purchases:** none


## Frequently asked questions

### Is Algo Demo free?

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

### Is JavaScript Compiler(Pro) free?

JavaScript Compiler(Pro) costs $2.99, with no in-app purchases.

### Do Algo Demo or JavaScript Compiler(Pro) have ads?

Algo Demo shows ads; JavaScript Compiler(Pro) does not.

### Which is updated more often, Algo Demo or JavaScript Compiler(Pro)?

Algo Demo ships an update every 4 months, and JavaScript Compiler(Pro) every 7 months. Most recently, Algo Demo was updated on October 2, 2026 and JavaScript Compiler(Pro) 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.*