# Systematic FYI vs System Design interview prep

The clearest difference is ads: Systematic FYI at none against System Design interview prep's shown. Systematic FYI also leads on update cadence (every 5 days vs monthly) and iOS requirement (15.1 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Systematic FYI sells 1 in-app purchase, starting at $3.99 per month 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.

Systematic FYI ships an update every 5 days, System Design interview prep monthly. The most recent releases landed on September 20, 2026 and July 23, 2026 respectively.

## The numbers

| Metric | Systematic FYI | System Design 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 | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 89 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [William Prin](https://appshunter.io/developer/1584585988) | [Abdelhak El Moussaoui](https://appshunter.io/developer/1827690433) |

## What reviewers say

### Systematic FYI

[App page](https://appshunter.io/ios/app/systematic-fyi/id6747363270)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Systematic Premium | $3.99 | per month |


### 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 Systematic FYI free?

Systematic FYI 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.

### Do Systematic FYI or System Design interview prep have ads?

System Design interview prep shows ads; Systematic FYI does not.

### Which is updated more often, Systematic FYI or System Design interview prep?

Systematic FYI ships an update every 5 days, and System Design interview prep monthly. Most recently, Systematic FYI was updated on September 20, 2026 and System Design interview prep on July 23, 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.*