# Enigma JS vs React Native Ninja

The clearest difference is in-app purchases: React Native Ninja at none against Enigma JS's 1. React Native Ninja also leads on update cadence (every 5 months vs every 14 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Enigma JS ships an update every 14 months, React Native Ninja every 5 months. The most recent releases landed on September 8, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Enigma JS | React Native Ninja |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 14 months | **Every 5 months** |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 40 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Yesno Labs](https://appshunter.io/developer/1704491583) | [FineTune (FZE)](https://appshunter.io/developer/6795082640) |

## 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

**In-app purchases (1)**

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


### React Native Ninja

[App page](https://appshunter.io/ios/app/react-native-ninja/id6754823698)

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

**In-app purchases:** none


## Frequently asked questions

### Is Enigma JS free?

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

### Is React Native Ninja free?

React Native Ninja is free to download, with no in-app purchases.

### Do Enigma JS or React Native Ninja have ads?

Both Enigma JS and React Native Ninja show ads.

### Which is updated more often, Enigma JS or React Native Ninja?

Enigma JS ships an update every 14 months, and React Native Ninja every 5 months. Most recently, Enigma JS was updated on September 8, 2026 and React Native Ninja on September 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*