# Enigma JS vs JandJava

The clearest difference is device support: Enigma JS at 3 against JandJava's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Enigma JS sells 1 one-off in-app purchase and JandJava sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Enigma JS | JandJava |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | — |
| Update frequency | Every 14 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 144 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Yesno Labs](https://appshunter.io/developer/1704491583) | [Online Learning](https://appshunter.io/developer/1790866777) |

## 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 |


### JandJava

[App page](https://appshunter.io/ios/app/jandjava/id6471397379)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - CH | $299.99 | one-time |
| Package - CG | $299.99 | one-time |
| Package - CI | $349.99 | one-time |
| Package - CJ | $399.99 | one-time |
| Package - CK | $449.99 | one-time |
| Package - CL | $499.99 | one-time |
| Package - CM | $599.99 | one-time |
| Package - CN | $699.99 | one-time |
| Package - CO | $799.99 | one-time |
| Package - CP | $899.99 | one-time |


## Frequently asked questions

### Is Enigma JS free?

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

### Is JandJava free?

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

---

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