# Steam Worx vs McElroy Operator

The clearest difference is update cadence: McElroy Operator at every 3 days against Steam Worx's every 2 months. 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 — 5.0 for Steam Worx against 5.0 for McElroy Operator. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Steam Worx ships an update every 2 months, McElroy Operator every 3 days. The most recent releases landed on September 30, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Steam Worx | McElroy Operator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/steam-worx/id6467222774/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/mcelroy-operator/id6802817566/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 18 MB | 19 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Watson McDaniel Company](https://appshunter.io/developer/1708408873) | [McElroy Manufacturing, Inc.](https://appshunter.io/developer/376891711) |

## What reviewers say

### Steam Worx

[App page](https://appshunter.io/ios/app/steam-worx/id6467222774)

This application assists engineers and technicians with complex fluid dynamics calculations. It provides tools for sizing and selecting pressure relief valves, control valves for steam and water, and heat exchangers. The app also includes calculators for pipe sizing, noise levels, and unit conversions.

**Highlights:** Pilot-Operated PRV Sizing, Control Valve Sizing (Steam & Water), Heat Exchanger Sizing, Pipe Sizing & Velocities, Noise Level & Cavitation Calculations, Unit Conversions

**Features:** macOS Compatibility

**In-app purchases:** none


### McElroy Operator

[App page](https://appshunter.io/ios/app/mcelroy-operator/id6802817566)

This app provides certified operators with easy access to their professional profiles, including qualifications and certifications. It also allows viewing summaries of joint reports and features a QR code for logging into the McElroy Data Logger.

**Highlights:** Operator profile access, View certifications, Access joint report summaries, QR code for Data Logger login

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

**In-app purchases:** none


## Frequently asked questions

### Is Steam Worx free?

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

### Is McElroy Operator free?

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

### Which has better reviews, Steam Worx or McElroy Operator?

Steam Worx and McElroy Operator are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Steam Worx or McElroy Operator have ads?

Neither Steam Worx nor McElroy Operator shows ads.

### Which is updated more often, Steam Worx or McElroy Operator?

Steam Worx ships an update every 2 months, and McElroy Operator every 3 days. Most recently, Steam Worx was updated on September 30, 2026 and McElroy Operator on October 21, 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.*