# Systematic FYI vs System Design Refresher

The clearest difference is in-app purchases: System Design Refresher at none against Systematic FYI's 1. Systematic FYI's advantage is update cadence (every 5 days vs monthly) and iOS requirement (15.1 vs 26.2). On price, ads 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. System Design Refresher asks for nothing beyond the download.

Systematic FYI ships an update every 5 days, System Design Refresher monthly. The most recent releases landed on September 20, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Systematic FYI | System Design Refresher |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Size | 30 MB | 18 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [William Prin](https://appshunter.io/developer/1584585988) | [Saurabh Sharma](https://appshunter.io/developer/1883599017) |

## 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 Refresher

[App page](https://appshunter.io/ios/app/system-design-refresher/id6760277935)

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

**In-app purchases:** none


## Frequently asked questions

### Is Systematic FYI free?

Systematic FYI is free to download, with in-app purchases available.

### Is System Design Refresher free?

System Design Refresher is free to download, with no in-app purchases.

### Do Systematic FYI or System Design Refresher have ads?

Neither Systematic FYI nor System Design Refresher shows ads.

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

Systematic FYI ships an update every 5 days, and System Design Refresher monthly. Most recently, Systematic FYI was updated on September 20, 2026 and System Design Refresher on September 12, 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.*