Comparison

Enigma JS vs Devv 30

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Enigma JS

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
Read full description

Enigma is a JavaScript quiz app featuring the most common interview questions. Here, you’ll find tricky parts of JavaScript language and the key concepts essential for React and React Native developers. Whether you are an experienced developer or a beginner, you'll find questions and explanations in this app that will help you learn and practice. Some quizzes are designed to understand the basics, while others targeting tricky parts of the Javascript language that we developers encounter time to time. - Refresh your knowledge by having quick quizzes anywhere during your day. - Stay up-to-date by learning and practicing tricky parts of the language. - For each question see detailed explanations that are designed to help you comprehend the concepts.

About

Devv 30

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
Read full description

With Devv 30, anyone can learn to code β€” even penguins. Build apps and websites, become a developer, and land your dream job. With Devv 30, you can become a programmer in just 30 days, with only a few minutes a day. Used by thousands of students, Devv 30 is the easiest and most effective way to learn programming β€” including HTML, CSS, JavaScript, TypeScript, Python, SQL, and more. Our programming courses and lessons are designed for everyone, even complete beginners with no prior experience. If you’ve never written a line of code but want to level up your skills and take advantage of the massive opportunities available to coders (Python, JavaScript, TypeScript, HTML, SQL), Devv 30 is the perfect app to dive into the world of programming. Install it now and start learning with short, hands-on, engaging lessons that fit right into your day. Devv 30 makes learning to code as simple and intuitive as possible. Our curriculum is built by industry professionals and helps you practice by building real-world projects using HTML, JavaScript, CSS, Python, and SQL. You’ll be able to create a strong portfolio or resume and prepare for real job opportunities. We’ve even added new courses on artificial intelligence (AI)! With Devv 30 you can: - Write your first line of code in just 3 minutes - Learn popular programming languages and tools: Python, JavaScript, HTML, SQL, CSS, AI - Code through fun exercises and 30-day challenge paths - Run your code directly in the app - Build a portfolio of real projects (perfect for your resume) - Earn a programming certificate to showcase your skills Just a few of the programming paths inside Devv 30: - Python Path: Learn AI and Data Science with 2,800+ exercises, 59 key concepts, and 35 real-world projects - Web Development Path: Build websites with over 15,000 exercises, 93 concepts, and 82 projects in HTML, CSS, and JavaScript - SQL Course: Gain data science skills and learn how to analyze data effectively - TypeScript Course: Master one of the most in-demand languages in today’s job market What Dev 30 students are saying: - "I wanted to learn a bit of basic coding... This app is incredibly easy to use, and the lessons are short but super effective." – Marco R. - "I started coding with Devv 30 a few days ago and I already understand how web pages are built! I recommend it to anyone who wants to start coding." – Perseus B. Why users love Dev 30: - Write your first line of code in just 3 minutes - Learn HTML, CSS, JavaScript, Python, SQL, and more - Get a programming certificate - Practice with real-world projects (like building a YouTube clone) - Just a few minutes a day is enough - Compete with other users, earn points, and win prizes! - Learn a full programming language - Build your resume and find a job Devv 30 makes programming easy and fun. Our expert-built lessons guide you step by step, letting you practice on real projects and complete exciting challenges. Whatever your goal is, Devv 30 will help you reach it fast. Want to build a website to share cat photos? No judgment. Want a new career? We’ve got you covered. Devv 30 prepares you for careers like: - Fullstack Developer - Backend Developer - App Developer - AI Programmer Download Devv 30 today and start your 30-day coding challenge! --- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://devv.notion.site/devv-30-privacy-policy

Screenshots

Enigma JS4 screens
Devv 304 screens

Verdict

The call

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.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences Β· 5 level
Enigma JS versus Devv 30: the parameters behind the verdict, then further details
ParameterEnigma JSDevv 30
PriceFreeFree
Positive reviews28.6% of reviews60.0% of reviews β€” better
Update frequencyEvery 14 monthsEvery 8 days β€” better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS15.112.4 β€” better
Further details β€” not scored
Size59 MB85 MB
Age rating4+4+
DeveloperYesno LabsMatteo Giardino

Customer experience

Enigma JS

Written reviews7 reviews
Positive28.6%
Neutral28.6%
Negative42.9%

Devv 30

Written reviews10 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

1 purchases

Enigma JS

One-time1
  • Remove ads and unlock content$9.99
10 purchases

Devv 30

Subscriptions8
  • Devv Pro Weekly$6.997 Days
  • Pro Monthly$6.991 Month
  • Devv Pro Monthly3 Days trial$8.991 Month
Show 5 more
  • Devv Pro Monthly$14.991 Month
  • Devv Pro 3 Months7 Days trial$17.993 Months
  • Pro Yearly7 Days trial$49.991 Year
  • Devv Pro Yearly3 Days trial$49.991 Year
  • Devv Pro Yearly7 Days trial$119.991 Year
One-time2
  • 1 Challenge Access$34.99
  • Lifetime Access$69.99

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.

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