# System Design interview prep vs Tech Interview Prep

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.

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.

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.

## The numbers

| Metric | System Design interview prep | Tech Interview Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/system-design-interview-prep/id6756310915/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 89 MB | 25 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Abdelhak El Moussaoui](https://appshunter.io/developer/1827690433) | [Aman Navani](https://appshunter.io/developer/1866204326) |

## What reviewers say

### 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 |


### Tech Interview Prep

[App page](https://appshunter.io/ios/app/tech-interview-prep/id6757340798)

**Features:** macOS Compatibility

**In-app purchases:** none


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