# WirelessUSG Flash vs eRMT

WirelessUSG Flash and eRMT both sit at 2.3 stars, but that hides the real split: 33% of eRMT's written reviews are positive against 14% of WirelessUSG Flash's. WirelessUSG Flash's advantage is update cadence (every 4 weeks vs every 2 months) and iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 2.3 for WirelessUSG Flash against 2.2 for eRMT. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews are what separate them: 14% of WirelessUSG Flash's written reviews are positive against 33% of eRMT's.

WirelessUSG Flash ships an update every 4 weeks, eRMT every 2 months. The most recent releases landed on September 2, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | WirelessUSG Flash | eRMT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (12 ratings)](https://appshunter.io/ios/app/wirelessusg-flash/id1548235287/reviews)** | [2.2 (6 ratings)](https://appshunter.io/ios/app/ermt/id6472037616/reviews) |
| Number of ratings | **12** | 6 |
| Positive reviews | 14.3% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 22 MB | 38 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [SonoStarMed](https://appshunter.io/developer/1113993886) | [Chongqing Moffy InnovationTechnology Co,Ltd](https://appshunter.io/developer/1716510724) |

## What reviewers say

### 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


### eRMT

[App page](https://appshunter.io/ios/app/ermt/id6472037616)

This app enhances respiratory muscle training with interactive games. It connects to a specialized trainer device via Bluetooth, allowing users to control in-game actions through breathing exercises. Designed for entertainment and training efficiency, it's intended for use with specific hardware.

**Highlights:** Connects to Sonmol/Nascool Respiratory Muscle Trainer, Bluetooth connectivity, Three interactive training games, Inhale/exhale controlled gameplay, Progress tracking for training efficiency, CE-certified and FDA-approved medical device integration

**In-app purchases:** none


## Frequently asked questions

### Is WirelessUSG Flash free?

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

### Is eRMT free?

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

### Which has better reviews, WirelessUSG Flash or eRMT?

WirelessUSG Flash is rated higher. WirelessUSG Flash averages 2.3 out of 5 from 12 ratings, while eRMT averages 2.2 from 6 ratings.

### Do WirelessUSG Flash or eRMT have ads?

Neither WirelessUSG Flash nor eRMT shows ads.

### Which is updated more often, WirelessUSG Flash or eRMT?

WirelessUSG Flash ships an update every 4 weeks, and eRMT every 2 months. Most recently, WirelessUSG Flash was updated on September 2, 2026 and eRMT on August 19, 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.*