LeetCard vs Cosmo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- AI-powered hints
- Personalized study plans
- Smart flashcards
- Clean organization
- Personalized dashboard
- Detailed analytics
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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
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.
- 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
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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
Verdict
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
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.
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.
LeetCard ships an update every 2 days, Cosmo fortnightly. Both last shipped on November 8, 2026.
| Parameter | LeetCard | Cosmo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (83 ratings) | 4.8 (860 ratings) — better |
| Positive reviews | 50.0% of reviews | 84.1% of reviews — better |
| Number of ratings | 83 | 860 — better |
| Update frequency | Every 2 days — better | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 | 16.4 |
| Further details — not scored | ||
| Size | 124 MB | 95 MB |
| Age rating | 4+ | 4+ |
| Developer | Kubicle LLC | CodeSignal |
Customer experience
LeetCard
Cosmo
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
LeetCard
- LeetCard Pro$3.991 Month
- LeetCard Pro3 Days trial$24.991 Year
Cosmo
- Unlimited Access7 Days trial$12.991 Month
- Unlimited Access7 Days trial$24.991 Month
- Unlimited Access7 Days trial$78.001 Year
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- Unlimited Access7 Days trial$149.991 Year








