Comparison

LeetCard vs Cosmo

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

Head to head
About

LeetCard

Prepare for coding interviews with AI-powered flashcards and adaptive learning. Master data structures, algorithms, and coding patterns with personalized plans and intelligent hints. Track your progress with detailed analytics to identify weak areas and stay motivated.

Highlights
  • AI-powered hints
  • Personalized study plans
  • Smart flashcards
  • Clean organization
  • Personalized dashboard
  • Detailed analytics
Features
Read full description

LeetCard is an AI-powered coding interview prep app that helps you master problems through smart flashcards, adaptive learning, and focused practice. Whether you're brushing up on fundamentals or grinding LeetCode Hard, LeetCard keeps you on track with personalized plans, clean organization, and intelligent hints - so you never get stuck. Key Features: • AI-powered hints for every problem, powered by OpenAI • Personalized study plans that adapt to your level • Smart flashcards for fast, on-the-go review • Clean organization of problems, notes, and progress • A personalized dashboard to stay focused and motivated • Detailed analytics to monitor growth and spot weak areas Support: • Privacy Policy: https://www.kubicle.studio/leetcard/privacy.html • Terms and Conditions: https://www.kubicle.studio/leetcard/terms.html

About

Cosmo

This app offers hands-on, practice-based lessons to build in-demand skills in areas like GenAI, business, and tech. It acts as a personal AI tutor, adapting to your learning pace and providing instant help on any topic. Earn shareable certificates and skill badges to advance your career.

Highlights
  • Personalized AI tutor
  • Hands-on, practice-based lessons
  • Learn GenAI, business, tech, and more
  • Earn skill badges and certificates
  • Instant help on any topic
  • 200+ career-building skills
Features
Read full description

Build real skills in just minutes a day. No videos. Just doing. Cosmo is your personal AI tutor, always ready with hands-on lessons that adapt to you. Whether you're between classes, commuting, or on a break, you’ll make real progress in GenAI, business, tech, and more. Built by CodeSignal, the AI platform trusted by over 3,000 top employers for hiring, including Google, Meta, Zoom, Netflix, TikTok, and Anthropic. Loved by over 1 million learners who build and prove their skills with CodeSignal. Why Cosmo • Cosmo, your AI tutor, adapts to you and guides you on your journey so you can learn faster • Fun, practice-based lessons that keep you engaged • Master the most in-demand skills to grow your career • Earn shareable certificates and skill badges • Take full courses or get instant help on any topic Every course is free. Learn GenAI, business, marketing, sales, finance, accounting, product management, project management, leadership, communication, emotional intelligence, Python, JavaScript, Go, Swift, Kotlin, Rust, web development, cloud, SQL, data science, analytics, machine learning, data engineering, personal finance, focus, decision making, critical thinking, public speaking, habit formation, and more. Explore 200+ career-building skills • GenAI: Practice prompts and apply ChatGPT at work • Finance: Understand money, markets, and valuation • Marketing: Learn digital ads, branding, SEO, and strategy • Coding: Learn Python, JavaScript, and more through practice • Data: Build skills in SQL, machine learning, and analytics • Leadership: Grow communication and strategic thinking • Personal Growth: Build habits, confidence, and clarity • Startups: Learn how to launch your idea into the world If you like Cosmo, try Cosmo+ to learn faster with unlimited energy. Learn on the web at: https://codesignal.com/learn Send feedback to: support@codesignal.com Privacy Policy: https://codesignal.com/privacy Terms of Use: https://codesignal.com/terms/

Screenshots

LeetCard4 screens
Cosmo4 screens

Verdict

The call

The clearest difference is ads: Cosmo at none against LeetCard's shown. Cosmo also leads on review sentiment (84% vs 50%) and rating (4.8 vs 4.4). LeetCard's advantage is update cadence (every 2 days vs fortnightly). On price, in-app purchases, monetization model 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. LeetCard sells 2 in-app purchases, starting at $3.99 per month and Cosmo sells 4 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Cosmo holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Cosmo has 860 ratings behind it against 83, so its average is the more settled of the two. Written reviews point the same way: 50% of LeetCard's written reviews are positive against 84% of Cosmo's.

UpkeepUpdate frequency

LeetCard ships an update every 2 days, Cosmo fortnightly. Both last shipped on November 8, 2026.

Scorecard5 real differences · 5 level
LeetCard versus Cosmo: the parameters behind the verdict, then further details
ParameterLeetCardCosmo
PriceFreeFree
Rating4.4 (83 ratings)4.8 (860 ratings) — better
Positive reviews50.0% of reviews84.1% of reviews — better
Number of ratings83860 — better
Update frequencyEvery 2 days — betterFortnightly
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone
Requires iOS16.416.4
Further details — not scored
Size124 MB95 MB
Age rating4+4+
DeveloperKubicle LLCCodeSignal

Customer experience

LeetCard

All ratings83 ratings
Positive85.5%
Neutral1.2%
Negative13.3%
Written reviews16 reviews
Positive50.0%
Neutral6.3%
Negative43.8%

Cosmo

All ratings857 ratings
Positive96.4%
Neutral1.1%
Negative2.6%
Written reviews113 reviews
Positive84.1%
Neutral0.9%
Negative15.0%

Bugs and requests

LeetCard

Not enough reviews yet to summarise bugs or requests.

Cosmo

Requested features

1 request
  • Ability to upgrade/customize Cosmo's outfit and spaceship

In-app purchases

2 purchases

LeetCard

Subscriptions2
  • LeetCard Pro$3.991 Month
  • LeetCard Pro3 Days trial$24.991 Year
4 purchases

Cosmo

Subscriptions4
  • Unlimited Access7 Days trial$12.991 Month
  • Unlimited Access7 Days trial$24.991 Month
  • Unlimited Access7 Days trial$78.001 Year
Show 1 more
  • Unlimited Access7 Days trial$149.991 Year

Questions

Is LeetCard free?
LeetCard is free to download, with in-app purchases available.
Is Cosmo free?
Cosmo is free to download, with in-app purchases available.
Which has better reviews, LeetCard or Cosmo?
Cosmo is rated higher. LeetCard averages 4.4 out of 5 from 83 ratings, while Cosmo averages 4.8 from 860 ratings.
Do LeetCard or Cosmo have ads?
LeetCard shows ads; Cosmo does not.
Which is updated more often, LeetCard or Cosmo?
LeetCard ships an update every 2 days, and Cosmo fortnightly. Most recently, LeetCard was updated on November 8, 2026 and Cosmo on November 8, 2026.

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