# SmartVUS zn vs WirelessUSG Flash

The clearest difference is update cadence: WirelessUSG Flash at every 4 weeks against SmartVUS zn's every 2 months. WirelessUSG Flash also leads on iOS requirement (13.0 vs 15.0). 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.

SmartVUS zn ships an update every 2 months, WirelessUSG Flash every 4 weeks. The most recent releases landed on September 25, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | SmartVUS zn | WirelessUSG Flash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (12 ratings)](https://appshunter.io/ios/app/wirelessusg-flash/id1548235287/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | — | Free |
| Size | 9 MB | 22 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [SonopTek Co, Ltd.](https://appshunter.io/developer/1077612429) | [SonoStarMed](https://appshunter.io/developer/1113993886) |

## What reviewers say

### SmartVUS zn

[App page](https://appshunter.io/ios/app/smartvus-zn/id1547566836)

**Features:** macOS Compatibility

**In-app purchases:** none


### WirelessUSG Flash

[App page](https://appshunter.io/ios/app/wirelessusg-flash/id1548235287)

This application displays ultrasound images for reference. It is important to note that it does not provide medical advice and users should consult a physician for diagnosis or treatment.

**Highlights:** Ultrasound image display, Reference imaging, Disclaimer for medical use

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartVUS zn free?

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

### Is WirelessUSG Flash free?

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

### Do SmartVUS zn or WirelessUSG Flash have ads?

Neither SmartVUS zn nor WirelessUSG Flash shows ads.

### Which is updated more often, SmartVUS zn or WirelessUSG Flash?

SmartVUS zn ships an update every 2 months, and WirelessUSG Flash every 4 weeks. Most recently, SmartVUS zn was updated on September 25, 2026 and WirelessUSG Flash on September 2, 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.*