# Enigma JS vs Ghai Chemistry Classes

The clearest difference is in-app purchases: Ghai Chemistry Classes at none against Enigma JS's 1. Ghai Chemistry Classes also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.1). On price, update cadence and device support there is nothing between them.

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

Enigma JS ships an update every 14 months, Ghai Chemistry Classes every 11 months. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Enigma JS | Ghai Chemistry Classes |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 11 months** |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 89 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yesno Labs](https://appshunter.io/developer/1704491583) | [Ginger Webs Pvt. Ltd.](https://appshunter.io/developer/808743814) |

## 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 |


### Ghai Chemistry Classes

[App page](https://appshunter.io/ios/app/ghai-chemistry-classes/id1530252379)

**In-app purchases:** none


## Frequently asked questions

### Is Enigma JS free?

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

### Is Ghai Chemistry Classes free?

Ghai Chemistry Classes is free to download, with no in-app purchases.

### Do Enigma JS or Ghai Chemistry Classes have ads?

Enigma JS shows ads; Ghai Chemistry Classes does not.

### Which is updated more often, Enigma JS or Ghai Chemistry Classes?

Enigma JS ships an update every 14 months, and Ghai Chemistry Classes every 11 months. Most recently, Enigma JS was updated on November 4, 2026 and Ghai Chemistry Classes on October 25, 2026.

---

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