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System Design Arcade

System Design Arcade

AI/ML & Backend Interview Prep

13 ratings
3 reviews
📚 Education
🔍 Reference
Free

Details

Released
April 21, 2026
Updated
October 19, 2026

Features

Developer

Harsha Hassan Somashekara
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About

Learn complex system design concepts through engaging, bite-sized arcade-style games. Master building blocks, design full systems, and practice with real infrastructure tools. Progress is saved locally and no account is required.

✓Arcade-style mini-games for system design concepts
✓End-to-end system design challenges
✓Hands-on drills with infrastructure tools
✓Narrative-driven story mode
✓Varied challenge types (multiple choice, puzzles, builder)
✓Daily challenges with streak tracking
✓Offline progress saving
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What's New in System Design Arcade

1.14.0

October 19, 2026

Your Progress Follows You Your day streak, streak freezes, shields and achievements are now saved to your account, so a reinstall or a new phone keeps them. Home, the daily and Stats now show the same day streak. The Answer, Drawn Architecture-builder questions now show the correct design as a diagram when you review them, in the reference list and in study, with every connection explained in words. Read aloud speaks those connections too. Fairer Questions Ordering questions with steps that can go in any order now accept each of those orders. Many design questions now grade exactly what their text describes, and hints that gave the answer away were rewritten. Code samples display as code. Safer Sign-In Signing in is more secure and now tells you when it fails. When someone else signs in on the same phone, they start fresh instead of inheriting the previous learner's study plan, goal, Incident Response score or streak reminders. Also New Since 1.12 Incident Response, a timed round of five production incidents. Streak Rescue: a streak of 3 or more broken by one missed day can be won back the next day with two questions, once a week. A one-card summary for every Concept, Problem, Tool and AI game you finish. On phones with Apple Intelligence, Explain It Differently and Ask the Coach, running on your device.

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User reviews

Most RecentHighest RatedLowest Rated

Amazing

This is incredibly well made
CCyaLater!

Thank you

Thanks for putting so much work and making it free! Thank you
SLSystem Design learner

Response from developer

These encouraging words help me to keep going by keeping it free. Let me know if you’ve got any feedback or improvements you need.

Genuinely good prep

A lot of other system design prep apps on the App Store are really just repackaged LLM outputs (more often than not, slop!) but this app was made with a lot of care and curation with the learner experience in mind. I have not come across another single resource that has as much breadth, structure and thoughtfulness in an iOS app. Would recommend if you are currently preparing for interviews.
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EEudaimonian

Response from developer

Thank you for the kind words. That’s encouraging. Let me know if you’ve got any feedback or improvements you need.

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FAQ

What is System Design Arcade?

System Design Arcade is a free mobile application that teaches system design concepts through a series of short, arcade-style games. It covers fundamental building blocks, full system designs, and practical tools, making interview preparation more engaging.

How does System Design Arcade help with interview preparation?

It breaks down complex topics like caching, sharding, and load balancing into manageable 60-second levels. The app uses active recall and varied challenge formats to ensure deep understanding, rather than passive learning.

Can I use System Design Arcade offline?

Yes, System Design Arcade works offline by default. Your progress is saved directly on your device, allowing you to study anytime, anywhere, without needing an internet connection.

Does System Design Arcade have ads?

No, System Design Arcade is completely ad-free. The app is designed to provide an uninterrupted learning experience without any advertisements.

How often is System Design Arcade updated?

New games are shipped every sprint, indicating a regular update cycle. The latest version, 1.6.0, was released on June 18, 2026, suggesting consistent development and content additions.

What devices does System Design Arcade support?

System Design Arcade is available on iPhone, iPad, and iPod. It is designed to be accessible across various Apple mobile devices.

Is System Design Arcade suitable for beginners?

Yes, the app is structured to help users master individual building blocks and then progress to designing complete systems. The 'Concepts' track focuses on mastering one building block at a time, making it suitable for those new to system design.

What is the learning methodology of System Design Arcade?

The app employs a gamified approach with active recall, using mini-games, puzzles, and scenario-based drills. This method aims to engage the user's brain more effectively than traditional study methods like reading or highlighting.