# JavaScript Compiler vs PREPARED App

The clearest difference is update cadence: PREPARED App at fortnightly against JavaScript Compiler's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JavaScript Compiler ships an update every 4 months, PREPARED App fortnightly. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | JavaScript Compiler | PREPARED App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (3 ratings)](https://appshunter.io/ios/app/javascript-compiler-run-js/id1546362047/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 28 MB | 74 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [OnePercent](https://appshunter.io/developer/1536020418) | [UCLan Cyprus](https://appshunter.io/developer/1718199206) |

## What reviewers say

### JavaScript Compiler

[App page](https://appshunter.io/ios/app/javascript-compiler-run-js/id1546362047)

This app provides a mobile environment to compile and run JavaScript programs. It features a code editor with syntax highlighting, exercise questions, and pre-written DSA programs to aid learning. It's completely free and ad-free for all users.

**Highlights:** Compile and run JavaScript programs, Code editor with syntax highlighting, Exercise questions for skill improvement, Includes general DSA programs with code, Programming and computer science fun facts

**Features:** macOS Compatibility

**In-app purchases:** none


### PREPARED App

[App page](https://appshunter.io/ios/app/prepared-app/id6473009485)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JavaScript Compiler free?

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

### Is PREPARED App free?

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

### Do JavaScript Compiler or PREPARED App have ads?

Neither JavaScript Compiler nor PREPARED App shows ads.

### Which is updated more often, JavaScript Compiler or PREPARED App?

JavaScript Compiler ships an update every 4 months, and PREPARED App fortnightly. Most recently, JavaScript Compiler was updated on October 3, 2026 and PREPARED App on October 4, 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.*