Comparison

Computational Complexity vs Enki

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

Head to head
About

Computational Complexity

Explore fundamental concepts of computational complexity with interactive graphs and live sorting algorithm demonstrations. Developed by academics, this app offers a fun and educational way to visualize algorithmic growth and efficiency.

Highlights
  • Interactive Big-O function graphs
  • Live sorting algorithm demonstrations
  • Visualizes algorithmic growth
  • Source code available on Github
  • Educational tool for computer science
Features
Read full description

This app demonstrates the basic principles of computational complexity. The growth of a few typical Big-O functions are illustrated with an interactive graph, and live demonstrations of sorting algorithms can be run using randomly generated data. This app was developed at SUNY Binghamton, by Prof. Patrick H. Madden. Version 1.1 is an expansion on this, with the assistance a few students (primarily Keith Gardner, and undergrad, and Anthony Canino, an MS grad). We're working on the app as a fun project, and as a way to introduce ACM student group members to iOS programming. The source for the app is available on Github; we'll be adding more algorithms and things, and if you're interested in helping out with the development, let us know! https://github.com/keithgardner2/complexity Yay computational complexity! Yay Hartmanis and Stearns!

About

Enki

This AI-powered coach helps you learn coding, data skills, and productivity tools. It offers personalized lessons, code review, and interactive exercises to build your expertise. Engage with a community, track your progress, and receive career advice to advance your technical skills.

Highlights
  • AI-powered skills coach
  • Personalized learning paths
  • Code review and feedback
  • Interactive coding playground
  • Spaced repetition revision workouts
  • Community learning and collaboration
  • 10,000+ lessons in 30+ skills
Features
Read full description

Enki is your AI-powered skills coach! Use it to learn coding, productivity tools, data skills, and generative AI tools. Tailored to fit your unique profile and goals, Enki is an AI-powered mentor in your pocket that can: * Explain any concept in simple language * Help with hints anytime you're stuck * Summarize lessons into key points * Review your code and provide feedback * Provide real-world examples * Translate content and converse in any language * Recommend resources based on your needs * Give career advice more generally Other features include: * Personalized content suggestions based on your learning preferences * Coding playground to apply your knowledge * Interactive questions to stimulate your thinking * Revision workouts powered by spaced repetition science * Daily reminders to help you build a learning habit * Tracked learning streaks to motivate your progress * Lesson bookmarking for quick access and sharing You can also learn with others in your company, school, or the Enki community by: * Engaging in discussions, mentoring other learners, and collaborating on exercises * Teaming up with friends, co-workers, or peers and tracking each other's progress * Sharing your favorite lessons with teammates or online Access 10,000+ lessons in 30+ skills and tools including: * Fundamental coding skills * Coding Basics * Computer Science * Programming languages * From Beginner to Advanced in each * Python * JavaScript * Golang * Kotlin * Swift * TypeScript * Java * C++ * Artificial Intelligence * Generative AI tools * Machine Learning * Frontend skills * React * Web * HTML * CSS * Data skills * SQL * Data Science * Data Analysis * R * Interview prep & practice * Productivity Tools * Excel & Google Sheets * Zapier * Webflow * Airtable * Blockchain * Bitcoin * NFTs * Other technical topics * Security * Functional Programming * Git * Regex * Docker * MongoDB * Linux Over 1.5 million people have used Enki to build and improve their coding, data and other critical skills. What the media say about us: "The exercises on Enki are focused on making professionals more productive." - Forbes "Ever imagined yourself as a JavaScript whizz, or pulling no punches with Python? Want to get a handle on SQL, or let yourself loose with Linux? Then let Enki be your coding coach, setting you daily workouts that tackle the intricacies of coding languages in bite-sized steps." - Apple's App Store; featured as app of the day in 100+ countries "Compared to free reading options this is structured, personalized content. Enki creates a 5-minute "workout" for you to learn important concepts in your spare time." - TechCrunch "The app supports everyone from beginners to more experienced coders. You can almost think of Enki the same way you would an exercise app. It provides you with daily workouts, but here you're leveling up your coding skills instead of burning fat and building muscle." - MakeUseOf "Enki adopts a different approach to the apps we've seen so far. It makes use of spaced repetition to help you learn specific concepts regarding coding." - iGeeksBlog Subscription pricing and terms: Enki offers an auto-renewing yearly and monthly subscription to provide you with unlimited access to the Learn Mode features while you maintain an active subscription. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Read more about our terms and conditions here: Terms of service: https://enki.com/terms Privacy policy: https://enki.com/privacy

Screenshots

Computational Complexity4 screens
Enki4 screens

Verdict

The call

The clearest difference is in-app purchases: Computational Complexity at none against Enki's 9. Computational Complexity also leads on review sentiment (100% vs 74%) and rating (5.0 vs 4.8). Enki's advantage is ratings volume (1.1K vs 4) and update cadence (monthly vs every 3 months). On price, ads and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Enki sells 9 in-app purchases, starting at $7.99 per month. Computational Complexity asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Computational Complexity holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Enki has 1.1K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of Computational Complexity's written reviews are positive against 74% of Enki's.

UpkeepUpdate frequency

Computational Complexity ships an update every 3 months, Enki monthly. The most recent releases landed on June 5, 2026 and September 24, 2026 respectively.

Scorecard7 real differences · 3 level
Computational Complexity versus Enki: the parameters behind the verdict, then further details
ParameterComputational ComplexityEnki
PriceFreeFree
Rating5.0 (4 ratings) — better4.8 (1.1K ratings)
Positive reviews100.0% of reviews — better74.4% of reviews
Number of ratings41.1K — better
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS6.0 — better15.1
Further details — not scored
Size18 MB42 MB
Age rating4+4+
DeveloperPatrick MaddenENKI LABS Inc.

Customer experience

Computational Complexity

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Enki

All ratings1,091 ratings
Positive94.9%
Neutral1.6%
Negative3.6%
Written reviews544 reviews
Positive74.4%
Neutral7.7%
Negative17.8%

Bugs and requests

Computational Complexity

Not enough reviews yet to summarise bugs or requests.

Enki

Reported bugs

4 issues
  • Login issues and lost accounts
  • Incorrect answers marked as correct
  • Freezing or crashing on certain lessons
  • Inability to unlock content as expected

Requested features

5 requests
  • Certificates or progress tracking
  • More advanced content and exercises
  • Sync across multiple devices
  • Customizable UI and color schemes
  • Better organization of content

In-app purchases

None

Computational Complexity

No in-app purchases

9 purchases

Enki

Subscriptions9
  • EnkiPro Monthly7 Days trial$7.991 Month
  • Learn Mode - Monthly7 Days trial$7.991 Month
  • Learn Mode: Monthly7 Days trial$11.991 Month
Show 6 more
  • EnkiPro 6 Months7 Days trial$35.996 Months
  • Learn Mode - 6 Months7 Days trial$35.996 Months
  • Learn Mode - Yearly7 Days trial$38.991 Year
  • EnkiPro7 Days trial$47.991 Year
  • Learn Mode: 6 Months7 Days trial$49.996 Months
  • Learn Mode: Yearly7 Days trial$59.991 Year

Questions

Is Computational Complexity free?
Computational Complexity is free to download, with no in-app purchases.
Is Enki free?
Enki is free to download, with in-app purchases available.
Which has better reviews, Computational Complexity or Enki?
Computational Complexity is rated higher. Computational Complexity averages 5.0 out of 5 from 4 ratings, while Enki averages 4.8 from 1.1K ratings.
Do Computational Complexity or Enki have ads?
Neither Computational Complexity nor Enki shows ads.
Which is updated more often, Computational Complexity or Enki?
Computational Complexity ships an update every 3 months, and Enki monthly. Most recently, Computational Complexity was updated on June 5, 2026 and Enki on September 24, 2026.

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