# System Design interview prep — AI Simulator for system design

> AI-powered simulator for software engineering system design interview preparation. (iPhone/iPad app by Abdelhak El Moussaoui.)

- Source: https://appshunter.io/ios/app/system-design-interview-prep/id6756310915 (this page in markdown: same URL + `.md`)
- Developer: [Abdelhak El Moussaoui](https://appshunter.io/developer/1827690433)
- Category: Education, Developer Tools
- Price: Free with in-app purchases
- Rating: 1.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 89 MB
- Languages: English
- Released: 2025-12-14
- Data updated: 2026-07-23
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/system-design-interview-prep/id6756310915/reviews.md

## What is System Design interview prep?

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.

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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

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlimited access | $12.99 | per month |
| Unlimited access | $99.99 | per year |
| Unlimited access | $6.99 | per month |
| Unlimited access | $4.99 | per 7 days |
| Unlimited access | $3.99 | per 7 days |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/system-design-interview-prep/id6756310915/reviews.md

### 1/5 — Cool but half-baked ChatGPT wrapper

*2026-02-06*

The description doesn’t match the application (design a link shortener? Huh?) and some of the optimal solutions seem dubious. The Pro version supposedly has “advanced analytics” but none are seen anywhere in the app while you’re on the trial.

**Developer response:** Thanks for the candid feedback, and sorry for the confusion and frustration this caused. We’re reviewing the app description to make sure it accurately reflects the current features, and we’re also validating the “optimal solutions” output to ensure it’s technically sound. We’re actively working to make “advanced analytics” visible during the trial so it matches what’s advertised.

We’d really appreciate the chance to learn more and make this right. Could you share details through this link: https://forms.gle/pYY51qc5irvPoSv59 ? Your input directly helps us prioritize and improve.

Thank you again for taking the time to share this — we’re committed to making the experience better.

### 1/5 — No way to view solutions

*2026-02-02*

If you don’t know you can’t do anything.

**Developer response:** Thanks for the feedback — we’re sorry the solutions weren’t visible or clear. We’re improving access and guidance now. If you can share details here, it would help a lot: https://forms.gle/pYY51qc5irvPoSv59

## Frequently asked questions about System Design interview prep

### What is System Design interview prep?

System Design interview prep is an AI-powered simulator designed to help software engineers practice for system design interviews. It offers interactive scenarios and an AI interrogator to challenge your design decisions.

### Does System Design interview prep have ads?

Yes, System Design interview prep contains advertisements. As a free app with in-app purchases, ads are included to support its development and availability.

### What are the subscription options for System Design interview prep?

System Design interview prep offers several subscription plans for unlimited access, including weekly options at $3.99 and $4.99, monthly options at $6.99 and $12.99, and an annual plan at $99.99 which includes a 7-day free trial.

### How does the AI Interrogator work in System Design interview prep?

The AI Interrogator in System Design interview prep acts as an interviewer, challenging your design choices, asking follow-up questions, and probing for weaknesses in your proposed system architecture.

### Can I track my progress with System Design interview prep?

Yes, the app provides detailed analytics to track your performance, identify knowledge gaps, and monitor your improvement over time with comprehensive metrics.

### What kind of scenarios are available in System Design interview prep?

The app features realistic scenarios covering classic and modern interview questions, such as 'Design a URL Shortener' and 'Design a Social Network,' to prepare you for common interview topics.

### How often is System Design interview prep updated?

The latest version of System Design interview prep is 1.0.3, last updated on March 9, 2026. Updates typically focus on improving features and addressing user feedback.

### What devices support System Design interview prep?

System Design interview prep is supported on iPhone and iPad devices, making it accessible for users on the Apple ecosystem.

## Version history (last 4 releases)

### 1.0.3 — 2026-03-09

- Faster, value‑first onboarding with clearer messaging
- Daily Drill now stays within the main navigation for a smoother flow
- Advanced architecture analysis

### 1.0.2 — 2026-01-12

* New Scenarios & Previews: We've added fresh system design challenges! You can now also preview
     scenarios directly from the lobby before diving in.
* Smarter AI Guidance: The simulation flow has been enhanced with detailed AI justifications for
     action planning and more robust error handling.
* Performance & Polish: We've squashed bugs and improved stability under the hood to ensure a seamless
     experience.

  Help Us Improve
  We are committed to building the best tool for mastering system design, and we need your help! Your
  feedback drives our improvements. Please verify the new features and share your thoughts with us.
 
  https://forms.gle/iiaWEEAGXB4TvSWP7

### 1.0.1 — 2025-12-17

Bug fixes

### 1.0.0 — 2025-12-14

No release notes.

## More apps by Abdelhak El Moussaoui

- [Stain Solver AI Laundry Helper](https://appshunter.io/ios/app/stain-solver-ai-laundry-helper/id6748856365)
- [Receipt & Expense Scanner](https://appshunter.io/ios/app/receipt-and-expense-scanner/id6757655713)
- [Cross Stitch Pattern Maker .](https://appshunter.io/ios/app/cross-stitch-pattern-maker/id6769818976)

All apps by Abdelhak El Moussaoui: https://appshunter.io/developer/1827690433

## Related topics

[abdelhak el moussaoui](https://appshunter.io/ios/topics/abdelhak-el-moussaoui) · [system design interview prep](https://appshunter.io/ios/topics/system-design-interview-prep)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-23.*