# System Design Refresher vs Syswise

The clearest difference is in-app purchases: System Design Refresher at none against Syswise's 5. Syswise's advantage is update cadence (daily 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. Syswise sells 5 in-app purchases, starting at $4.99 per 7 days. System Design Refresher asks for nothing beyond the download.

System Design Refresher ships an update monthly, Syswise daily. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | System Design Refresher | Syswise |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Size | 18 MB | 39 MB |
| Requires iOS | 26.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Saurabh Sharma](https://appshunter.io/developer/1883599017) | [Cengizhan Hakan](https://appshunter.io/developer/6796688466) |

## What reviewers say

### System Design Refresher

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

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

**In-app purchases:** none


### Syswise

[App page](https://appshunter.io/ios/app/syswise-system-design-prep/id6796688464)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Annual | $39.99 | per year |
| 500 Gems | $1.99 | one-time |
| 1400 Gems | $4.99 | one-time |
| 3000 Gems | $9.99 | one-time |


## Frequently asked questions

### Is System Design Refresher free?

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

### Is Syswise free?

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

### Do System Design Refresher or Syswise have ads?

Neither System Design Refresher nor Syswise shows ads.

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

System Design Refresher ships an update monthly, and Syswise daily. Most recently, System Design Refresher was updated on September 30, 2026 and Syswise on October 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.*