# ISS calculator vs WirelessUSG Flash

The clearest difference is rating: ISS calculator at 5.0 against WirelessUSG Flash's 2.3. ISS calculator also leads on update cadence (every 3 days vs monthly) and iOS requirement (13.0 vs 15.0). WirelessUSG Flash's advantage is ratings volume (12 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ISS calculator holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: WirelessUSG Flash has 12 ratings behind it against 1, so its average is the more settled of the two.

ISS calculator ships an update every 3 days, WirelessUSG Flash monthly. The most recent releases landed on September 22, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ISS calculator | WirelessUSG Flash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iss-calculator/id1531086115/reviews)** | [2.3 (12 ratings)](https://appshunter.io/ios/app/wirelessusg-flash/id1548235287/reviews) |
| Number of ratings | 1 | **12** |
| Positive reviews | — | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | Free | Free |
| Size | 2 MB | 22 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Sujal Adhia](https://appshunter.io/developer/1475334795) | [SonoStarMed](https://appshunter.io/developer/1113993886) |

## What reviewers say

### ISS calculator

[App page](https://appshunter.io/ios/app/iss-calculator/id1531086115)

This tool helps assess the severity and extent of ichthyosis across the body. It's designed for clinical trials, research, and practice to track treatment response in adults and children. The system follows FDA guidelines for comprehensive scoring.

**Highlights:** Assess ichthyosis extent and severity, User-friendly instrument, For clinical trials and research, Track treatment response, Score adults and children, Follows FDA guidelines

**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 ISS calculator free?

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

### Is WirelessUSG Flash free?

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

### Which has better reviews, ISS calculator or WirelessUSG Flash?

ISS calculator is rated higher. ISS calculator averages 5.0 out of 5 from 1 ratings, while WirelessUSG Flash averages 2.3 from 12 ratings.

### Do ISS calculator or WirelessUSG Flash have ads?

Neither ISS calculator nor WirelessUSG Flash shows ads.

### Which is updated more often, ISS calculator or WirelessUSG Flash?

ISS calculator ships an update every 3 days, and WirelessUSG Flash monthly. Most recently, ISS calculator was updated on September 22, 2026 and WirelessUSG Flash on October 20, 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.*