Comparison

Systematic FYI vs ReelCode

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

Head to head
About

Systematic FYI

Features
Read full description

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 distractionsβ€”just system design flashcard practice. Privacy Policy: https://www.systematic.fyi/privacy Terms of Service: https://www.systematic.fyi/terms

About

ReelCode

Features
Read full description

ReelCode – Ship the Interview Real interview problems, one swipe at a time. ReelCode turns interview prep into a fast, addictive, scroll-style experience β€” no more sitting through hour-long tutorials or losing track of what you've already covered. Every card in your feed is a real coding or CS-fundamentals problem, pulled from actual interview rounds. Swipe through DSA challenges, Java questions, System Design scenarios, and more β€” each one clearly tagged by difficulty (Easy, Medium, Hard) so you always know what you're getting into. What you'll practice ReelCode covers the topics that actually come up in interviews: Data Structures & Algorithms, Java, Low-Level Design (LLD), System Design, DBMS, Operating Systems, SQL, Spring Boot, React, and DevOps. Set your preferred languages β€” Java, Python, C++, JavaScript, TypeScript, Go, C#, Kotlin, Swift, Rust, Ruby, and more β€” so relevant problems show up first. Recall, don't just review ReelCode tracks what you've already seen and brings it back when it matters, so you're not just passively scrolling β€” you're reinforcing what you've learned. Problems you've encountered before are clearly marked, helping you build real recall instead of false confidence. Built for how you actually study No long sign-up forms, no clunky course structure. Log in in seconds with email OTP, Google, or Apple, and land straight in your feed. Search by problem, error, or topic when you need something specific, or just keep swiping and let the feed guide you. Who it's for Students and freshers preparing for their first technical interviews Working professionals prepping for a job switch Anyone who wants consistent, low-effort interview practice that fits into spare minutes throughout the day Stop dreading interview prep. Open ReelCode, swipe into a problem, and start shipping the interview β€” one card at a time.

Screenshots

Systematic FYI3 screens
ReelCode4 screens

Verdict

The call

The clearest difference is in-app purchases: ReelCode at none against Systematic FYI's 1. Systematic FYI's advantage is ads (none vs shown) and update cadence (every 5 days vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Systematic FYI sells 1 in-app purchase, starting at $3.99 per month. ReelCode asks for nothing beyond the download.

UpkeepUpdate frequency

Systematic FYI ships an update every 5 days, ReelCode every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Β· 3 level
Systematic FYI versus ReelCode: the parameters behind the verdict, then further details
ParameterSystematic FYIReelCode
PriceFreeFree
Update frequencyEvery 5 days β€” betterEvery 3 weeks
AdsNo β€” betterYes
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 β€” better
Further details β€” not scored
Size30 MB31 MB
Age rating4+4+
DeveloperWilliam PrinArrays Technologies Private Limited

In-app purchases

1 purchases

Systematic FYI

Subscriptions1
  • Systematic Premium$3.991 Month
None

ReelCode

No in-app purchases

Questions

Is Systematic FYI free?
Systematic FYI is free to download, with in-app purchases available.
Is ReelCode free?
ReelCode is free to download, with no in-app purchases.
Do Systematic FYI or ReelCode have ads?
ReelCode shows ads; Systematic FYI does not.
Which is updated more often, Systematic FYI or ReelCode?
Systematic FYI ships an update every 5 days, and ReelCode every 3 weeks. Most recently, Systematic FYI was updated on November 5, 2026 and ReelCode on October 31, 2026.

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