Comparison

System Design interview prep vs Tech Interview 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

Tech Interview Prep

Features
Read full description

Master Data Structures, Algorithms, and System Design with DSA Prep — the intuitive flashcard app designed for software engineering interview preparation. SWIPE TO LEARN Review 150+ essential topics using our simple swipe interface. Swipe right if you know it, left if you need more practice. It's that easy. WHAT'S COVERED • Data Structures: Arrays, Linked Lists, Trees, Graphs, Heaps, Hash Tables • Algorithms: Sorting, Searching, Dynamic Programming, Recursion, Backtracking • System Design: Scalability, Load Balancing, Caching, Databases, Microservices TRACK YOUR PROGRESS See exactly where you stand. Track which topics you've mastered, which need review, and what's left to learn. BOOKMARK & REVISIT Save tricky topics for later. Your bookmarks sync across devices so you can study anywhere. CODE EXAMPLES Each topic includes practical code snippets to reinforce your understanding. STUDY ANYWHERE Your progress syncs to the cloud. Start on your phone, continue on your tablet — your data follows you. Perfect for preparing for interviews at top tech companies. Whether you're a new grad or an experienced engineer, DSA Prep helps you review efficiently and build confidence. Download now and start prepping for your next tech interview.

Screenshots

System Design interview prep4 screens
Tech Interview Prep4 screens

Verdict

The call

The clearest difference is in-app purchases: Tech Interview Prep at none against System Design interview prep's 5. Tech Interview Prep also leads on ads (none vs shown) and update cadence (daily vs monthly). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. System Design interview prep sells 5 in-app purchases, starting at $3.99 per 7 days. Tech Interview Prep asks for nothing beyond the download.

UpkeepUpdate frequency

System Design interview prep ships an update monthly, Tech Interview Prep daily. The most recent releases landed on July 23, 2026 and September 7, 2026 respectively.

Scorecard4 real differences · 6 level
System Design interview prep versus Tech Interview Prep: the parameters behind the verdict, then further details
ParameterSystem Design interview prepTech Interview Prep
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyMonthlyDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size89 MB25 MB
Age rating4+17+
DeveloperAbdelhak El MoussaouiAman Navani

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

Tech Interview 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 Tech Interview Prep free?
Tech Interview Prep is free to download, with no in-app purchases.
Do System Design interview prep or Tech Interview Prep have ads?
System Design interview prep shows ads; Tech Interview Prep does not.
Which is updated more often, System Design interview prep or Tech Interview Prep?
System Design interview prep ships an update monthly, and Tech Interview Prep daily. Most recently, System Design interview prep was updated on July 23, 2026 and Tech Interview Prep on September 7, 2026.

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