LeetCard vs System Design Refresher
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
System Design Refresher
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System Design Refresher is a free study companion for software engineers preparing for system design interviews. WHAT'S INSIDE • 30+ system design articles covering distributed systems, databases, caching, and more • Engineering blogs from top tech companies (Google, Meta, Stripe, Airbnb, and more) aggregated in one place • AI-powered flashcards with spaced repetition • Ask AI to summarize or explain any article in plain language • Favorites, reading progress tracking, and custom RSS feeds FEATURES • Works offline — articles download for reading without internet • Dark mode, font customization, and text size controls • Face ID / Touch ID lock for privacy • Sign in with Google or Apple, or use as a guest with no account required
Screenshots
Verdict
The clearest difference is in-app purchases: System Design Refresher at none against LeetCard's 3. System Design Refresher also leads on ads (none vs shown). LeetCard's advantage is update cadence (every 2 days vs monthly) and iOS requirement (16.4 vs 26.2). On price 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 3 in-app purchases, starting at $3.99 per month. System Design Refresher asks for nothing beyond the download.
LeetCard ships an update every 2 days, System Design Refresher monthly. The most recent releases landed on September 25, 2026 and September 12, 2026 respectively.
| Parameter | LeetCard | System Design Refresher |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (75 ratings) — better | — |
| Positive reviews | 53.8% of reviews | — |
| Number of ratings | 75 — better | — |
| Update frequency | Every 2 days — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.4 — better | 26.2 |
| Further details — not scored | ||
| Size | 124 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Kubicle LLC | Saurabh Sharma |
In-app purchases
LeetCard
- LeetCard Pro$3.991 Month
- LeetCard Pro3 Days trial$24.991 Year
- LeetCard Pro$39.99
System Design Refresher
No in-app purchases
Questions
Is LeetCard free?
Is System Design Refresher free?
Do LeetCard or System Design Refresher have ads?
Which is updated more often, LeetCard or System Design Refresher?
Other comparisons
