Steam Worx vs McElroy Operator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Steam Worx
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.
- Pilot-Operated PRV Sizing
- Control Valve Sizing (Steam & Water)
- Heat Exchanger Sizing
- Pipe Sizing & Velocities
- Noise Level & Cavitation Calculations
- Unit Conversions
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The Steam Worx app is your complete resource for: o Pilot-Operated PRV Sizing & Selection o Control Valve Sizing for Steam & Water o Full models codes for Watson McDaniel HD & HB Series Valves o Heat Exchanger Sizing o Pipe Sizing and Velocities o Noise Levels and Cavitation Calculations o Noise Attenuation & Anti-Cavitation Adapter Design o Steam Calculators o Comprehensive Unit Conversions
McElroy Operator
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.
- Operator profile access
- View certifications
- Access joint report summaries
- QR code for Data Logger login
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This application allows McElroy-certified operators to easily access their profile. This includes operator qualifications and certifications. Summaries of joint reports can also be viewed. At the core of the app is a QR code that operators can use to log into their profiles when using the McElroy Data Logger.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Steam Worx | McElroy Operator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 18 MB | 19 MB |
| Age rating | 17+ | 4+ |
| Developer | Watson McDaniel Company | McElroy Manufacturing, Inc. |
Customer experience
Steam Worx
McElroy Operator
In-app purchases
Steam Worx
No in-app purchases
McElroy Operator
No in-app purchases
