# DSA Master vs System Design interview prep

The clearest difference is rating: DSA Master at 4.2 against System Design interview prep's 1.0. DSA Master also leads on update cadence (weekly vs monthly) and ratings volume (35 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. DSA Master sells 1 one-off in-app purchase and System Design interview prep sells 5 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

DSA Master holds the better App Store score, 4.2 against 1.0. That said, the two scores are not equally well evidenced: DSA Master has 35 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 13% of DSA Master's written reviews are positive against 0% of System Design interview prep's.

DSA Master ships an update weekly, System Design interview prep monthly. The most recent releases landed on September 22, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | DSA Master | System Design interview prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (35 ratings)](https://appshunter.io/ios/app/dsa-master-data-and-algorithms/id1672776683/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/system-design-interview-prep/id6756310915/reviews) |
| Number of ratings | **35** | 2 |
| Positive reviews | **12.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 150 MB | 89 MB |
| Requires iOS | **16.2** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alok Singh](https://appshunter.io/developer/1508795536) | [Abdelhak El Moussaoui](https://appshunter.io/developer/1827690433) |

## What reviewers say

### DSA Master

[App page](https://appshunter.io/ios/app/dsa-master-data-and-algorithms/id1672776683)

Master algorithms and data structures with interactive visualizations, executable code, and practice challenges. Supports multiple programming languages and offers progress tracking for technical interview preparation.

**Highlights:** Interactive visualizations, Live code execution, Multi-language support, Practice challenges, Progress tracking, Algorithm animations

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### System Design interview prep

[App page](https://appshunter.io/ios/app/system-design-interview-prep/id6756310915)

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:** macOS Compatibility

**In-app purchases (5)**

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


## Frequently asked questions

### Is DSA Master free?

DSA Master is free to download, with in-app purchases available.

### Is System Design interview prep free?

System Design interview prep is free to download, with in-app purchases available.

### Which has better reviews, DSA Master or System Design interview prep?

DSA Master is rated higher. DSA Master averages 4.2 out of 5 from 35 ratings, while System Design interview prep averages 1.0 from 2 ratings.

### Do DSA Master or System Design interview prep have ads?

Both DSA Master and System Design interview prep show ads.

### Which is updated more often, DSA Master or System Design interview prep?

DSA Master ships an update weekly, and System Design interview prep monthly. Most recently, DSA Master was updated on September 22, 2026 and System Design interview prep on September 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*