# Enigma JS vs Devv 30

The clearest difference is review sentiment: Devv 30 at 60% against Enigma JS's 29%. Devv 30 also leads on update cadence (every 8 days vs every 14 months) and iOS requirement (12.4 vs 15.1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Enigma JS sells 1 one-off in-app purchase and Devv 30 sells 10 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Enigma JS ships an update every 14 months, Devv 30 every 8 days. The most recent releases landed on September 8, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | Enigma JS | Devv 30 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 28.6% of reviews | **60.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 14 months | **Every 8 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 59 MB | 85 MB |
| Requires iOS | 15.1 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yesno Labs](https://appshunter.io/developer/1704491583) | [Matteo Giardino](https://appshunter.io/developer/1753230979) |

## 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 |


### Devv 30

[App page](https://appshunter.io/ios/app/devv-30-learn-coding/id6504672779)

Learn to code in just 30 days with short, engaging lessons. Build real-world projects, create a portfolio, and prepare for a developer career. Covers Python, JavaScript, HTML, and more.

**Highlights:** Learn popular programming languages, Build real-world projects, Create a portfolio for your resume, Earn a programming certificate, Daily coding challenges, Run code directly in the app

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Devv Pro Weekly | $6.99 | per 7 days |
| Pro Monthly | $6.99 | per month |
| Devv Pro Monthly | $8.99 | per month |
| Devv Pro Monthly | $14.99 | per month |
| Devv Pro 3 Months | $17.99 | per 3 months |
| Pro Yearly | $49.99 | per year |
| Devv Pro Yearly | $49.99 | per year |
| Devv Pro Yearly | $119.99 | per year |
| 1 Challenge Access | $34.99 | one-time |
| Lifetime Access | $69.99 | one-time |


## Frequently asked questions

### Is Enigma JS free?

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

### Is Devv 30 free?

Devv 30 is free to download, with in-app purchases available.

### Do Enigma JS or Devv 30 have ads?

Both Enigma JS and Devv 30 show ads.

### Which is updated more often, Enigma JS or Devv 30?

Enigma JS ships an update every 14 months, and Devv 30 every 8 days. Most recently, Enigma JS was updated on September 8, 2026 and Devv 30 on August 22, 2026.

---

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