# Enigma JS vs JS Library Reference

The clearest difference is in-app purchases: JS Library Reference at none against Enigma JS's 1. JS Library Reference also leads on ads (none vs shown). Enigma JS's advantage is iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Enigma JS sells 1 one-off in-app purchase. JS Library Reference asks for nothing beyond the download.

## The numbers

| Metric | Enigma JS | JS Library Reference |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 3 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yesno Labs](https://appshunter.io/developer/1704491583) | [Roger Rub](https://appshunter.io/developer/1852594545) |

## What reviewers say

### Enigma JS

[App page](https://appshunter.io/ios/app/enigma-js-interview-questions/id1308401829)

This app offers JavaScript quizzes covering common interview questions for web and mobile developers. It provides detailed explanations to help users learn and practice tricky language concepts and essential React/React Native knowledge.

**Highlights:** Common JavaScript interview questions, React and React Native concepts, Detailed explanations for each question, Quizzes for beginners and experienced developers, Practice tricky language parts

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads and unlock content | $9.99 | one-time |


### JS Library Reference

[App page](https://appshunter.io/ios/app/js-library-reference/id6756442365)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Enigma JS free?

Enigma JS is free to download, with in-app purchases available.

### Is JS Library Reference free?

JS Library Reference is free to download, with no in-app purchases.

### Do Enigma JS or JS Library Reference have ads?

Enigma JS shows ads; JS Library Reference does not.

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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.*