Systematic FYI vs System Design Refresher
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Systematic FYI
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Review key concepts with a simple system design flashcard app for your system design interview. This app includes three sets of flashcards focused on common interview questions, patterns, and tradeoffs. It’s designed to help you build intuition for system design interviews at FAANG companies like Google, Meta, Amazon, and other top tech firms. Ideal for software engineers preparing for interviews or brushing up on architecture fundamentals. No extra features or distractions—just system design flashcard practice. Privacy Policy: https://www.systematic.fyi/privacy Terms of Service: https://www.systematic.fyi/terms
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 Systematic FYI's 1. Systematic FYI's advantage is update cadence (every 5 days vs monthly) and iOS requirement (15.1 vs 26.2). 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
Both are free to download. Systematic FYI sells 1 in-app purchase, starting at $3.99 per month. System Design Refresher asks for nothing beyond the download.
Systematic FYI ships an update every 5 days, System Design Refresher monthly. The most recent releases landed on September 20, 2026 and September 12, 2026 respectively.
| Parameter | Systematic FYI | System Design Refresher |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.2 |
| Further details — not scored | ||
| Size | 30 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | William Prin | Saurabh Sharma |
In-app purchases
Systematic FYI
- Systematic Premium$3.991 Month
System Design Refresher
No in-app purchases
Questions
Is Systematic FYI free?
Is System Design Refresher free?
Do Systematic FYI or System Design Refresher have ads?
Which is updated more often, Systematic FYI or System Design Refresher?
Other comparisons
