# JavaScript Compiler vs Oplas Answer

The clearest difference is in-app purchases: JavaScript Compiler at none against Oplas Answer's 4. JavaScript Compiler also leads on update cadence (every 4 months vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Oplas Answer sells 4 in-app purchases, starting at $8.99 per 7 days. JavaScript Compiler asks for nothing beyond the download.

JavaScript Compiler ships an update every 4 months, Oplas Answer every 10 months. The most recent releases landed on October 20, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | JavaScript Compiler | Oplas Answer |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 10 months |
| Monetization | Free | — |
| Size | 28 MB | 28 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OnePercent](https://appshunter.io/developer/1536020418) | [Maryam Hamoud](https://appshunter.io/developer/1674732496) |

## 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


### Oplas Answer

[App page](https://appshunter.io/ios/app/oplas-answer/id6449993998)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ONE WEEK PASS | $8.99 | per 7 days |
| ONE MONTH PASS | $19.99 | per month |
| MIKUMI(FOR ONE MONTH) | $39.99 | per month |
| KILIMANJARO(FOR ONE MONTH) | $59.99 | per month |


## Frequently asked questions

### Is JavaScript Compiler free?

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

### Is Oplas Answer free?

Oplas Answer is free to download, with in-app purchases available.

### Do JavaScript Compiler or Oplas Answer have ads?

Neither JavaScript Compiler nor Oplas Answer shows ads.

### Which is updated more often, JavaScript Compiler or Oplas Answer?

JavaScript Compiler ships an update every 4 months, and Oplas Answer every 10 months. Most recently, JavaScript Compiler was updated on October 20, 2026 and Oplas Answer on October 27, 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.*