# WSS vs Sulf Scan

The clearest difference is update cadence: Sulf Scan at every 3 weeks against WSS's every 27 months. Sulf Scan also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

WSS ships an update every 27 months, Sulf Scan every 3 weeks. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | WSS | Sulf Scan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 3 weeks** |
| Size | 17 MB | 45 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Atlas Tech Solutions](https://appshunter.io/developer/1471358794) | [UNOVA](https://appshunter.io/developer/1210445553) |

## What reviewers say

### WSS

[App page](https://appshunter.io/ios/app/wss/id1471358795)

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

**In-app purchases:** none


### Sulf Scan

[App page](https://appshunter.io/ios/app/sulf-scan/id6467767120)

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

**In-app purchases:** none


## Frequently asked questions

### Is WSS free?

WSS is free to download, with no in-app purchases.

### Is Sulf Scan free?

Sulf Scan is free to download, with no in-app purchases.

### Do WSS or Sulf Scan have ads?

Neither WSS nor Sulf Scan shows ads.

### Which is updated more often, WSS or Sulf Scan?

WSS ships an update every 27 months, and Sulf Scan every 3 weeks. Most recently, WSS was updated on October 29, 2026 and Sulf Scan on October 27, 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.*