Comparison

System Design interview prep vs Blue Penguin Linux Prep

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

Head to head
About

System Design interview prep

This app simulates system design interviews with an AI interrogator and interactive scenarios. Practice real-world architecture problems, receive instant feedback, and track your progress to ace your next tech interview.

Highlights
  • Interactive War Room for architecture scenarios
  • AI Interrogator challenges design decisions
  • Realistic system design interview questions
  • Daily practice drills for skill sharpening
  • Detailed performance analytics
  • Instant feedback and best practice learning
Features
Read full description

ArchSim is the ultimate training ground for software engineers preparing for system design interviews. Forget passive reading—ArchSim puts you in the driver’s seat of a high-stakes engineering simulation with a fast, value-first onboarding and a 60‑second drill preview to get you into the action quickly. Key Features: Interactive War Room: Solve real-world architecture scenarios in a dynamic environment. Define requirements, estimate capacity, and design your system component by component. AI Interrogator: Face off against an intelligent Prep AI that challenges your decisions, asks follow-up questions, and probes for weaknesses in your design. Realistic Scenarios: Tackle classic and modern interview questions like “Design a URL Shortener” and “Design a Social Network.” Perfect for your job search. Daily Drills: Short 5–10 minute practice sessions to build fundamentals, track streaks, and sharpen core skills. Detailed Analytics: Track your performance, identify knowledge gaps, and monitor your improvement over time with comprehensive metrics. Debrief & Learn: Get instant feedback on your design choices and learn best practices for scalability, reliability, and maintainability. Whether you are a junior developer or a staff engineer, ArchSim provides the practice you need to ace your next tech interview and land your dream job. ----------- Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. Terms of Use: https://calico-magnolia-61e.notion.site/archsim-terms-of-use-2c6 Privacy Policy: https://calico-magnolia-61e.notion.site/archsim-privacy-policy-2c

About

Blue Penguin Linux Prep

Prepare for the RHCSA 10 (EX200) exam with offline study materials, practice questions, and hands-on labs. Track your progress, maintain a practice streak, and set exam reminders. All your data is stored locally.

Highlights
  • Exam-focused study material
  • Practice multiple-choice questions
  • Hands-on labs with verification
  • Timed mock exams
  • Progress tracking and streaks
  • Personal notes and bookmarks
  • Offline access
Read full description

Blue Penguin Linux Prep helps you prepare for the RHCSA 10 (EX200) exam with concise, exam-focused study material and lots of practice — all offline, with no account required. WHAT'S INSIDE • 18 topics: essential tools, users & groups, permissions & ACLs, software (DNF & Flatpak), systemd, storage & LVM, filesystems, NFS & autofs, networking, firewall & SELinux, SSH, scheduling, boot & recovery, processes & tuning, shell scripting and containers. • 90 multiple-choice questions with clear explanations — five per topic. • A timed 15-question mock exam that simulates exam pressure. • 10 hands-on practice labs with verification commands. • Personal notes and bookmarks for the built-in study notes. STAY ON TRACK • Progress tracking and best-score history for every topic. • A daily practice streak to keep your momentum. • Set your exam date for a live countdown. • Optional reminders: twice-daily practice questions plus an exam countdown with encouragement. Everything is stored locally on your device. No sign-up, no ads, no data collection. Red Hat, RHCSA and Red Hat Enterprise Linux are trademarks or registered trademarks of Red Hat, Inc. This app is independent and is not endorsed by or affiliated with Red Hat, LLC.

Screenshots

System Design interview prep4 screens
Blue Penguin Linux Prep4 screens

Verdict

The call

The clearest difference is price: System Design interview prep at Free against Blue Penguin Linux Prep's $1.99. Blue Penguin Linux Prep's advantage is rating (5.0 vs 1.0) and in-app purchases (none vs 5). On ratings volume, update cadence 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

System Design interview prep is free to download; Blue Penguin Linux Prep costs $1.99 up front. System Design interview prep sells 5 in-app purchases, starting at $3.99 per 7 days. Blue Penguin Linux Prep asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Blue Penguin Linux Prep holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

System Design interview prep ships an update monthly, Blue Penguin Linux Prep fortnightly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
System Design interview prep versus Blue Penguin Linux Prep: the parameters behind the verdict, then further details
ParameterSystem Design interview prepBlue Penguin Linux Prep
PriceFree — better$1.99
Rating1.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings2 — better1
Update frequencyMonthlyFortnightly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.615.0 — better
Further details — not scored
Size89 MB21 MB
Age rating4+4+
DeveloperAbdelhak El MoussaouiLeason Rykaart

In-app purchases

5 purchases

System Design interview prep

Subscriptions5
  • Unlimited access$3.997 Days
  • Unlimited access$4.997 Days
  • Unlimited access$6.991 Month
Show 2 more
  • Unlimited access7 Days trial$12.991 Month
  • Unlimited access7 Days trial$99.991 Year
None

Blue Penguin Linux Prep

No in-app purchases

Questions

Is System Design interview prep free?
System Design interview prep is free to download, with in-app purchases available.
Is Blue Penguin Linux Prep free?
Blue Penguin Linux Prep costs $1.99, with no in-app purchases.
Which has better reviews, System Design interview prep or Blue Penguin Linux Prep?
Blue Penguin Linux Prep is rated higher. System Design interview prep averages 1.0 out of 5 from 2 ratings, while Blue Penguin Linux Prep averages 5.0 from 1 ratings.
Do System Design interview prep or Blue Penguin Linux Prep have ads?
System Design interview prep shows ads; Blue Penguin Linux Prep does not.
Which is updated more often, System Design interview prep or Blue Penguin Linux Prep?
System Design interview prep ships an update monthly, and Blue Penguin Linux Prep fortnightly. Most recently, System Design interview prep was updated on October 30, 2026 and Blue Penguin Linux Prep on October 31, 2026.

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