PHS vs Prime Ecosystem
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PHS
This app analyzes and interprets thermal risk by calculating predicted heat strain based on user-entered data and ISO 7933:2004 formulas. It offers graphical illustrations and summaries to help manage thermal risks associated with tasks or environments.
- Thermal risk analysis
- Predicted heat strain calculations
- ISO 7933:2004 formula application
- Graphical illustration of heat strain
- Thermal risk management guidance
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The PHS application analyses and interprets thermal risk using calculations of predicted heat strain. The application applies predicted heat strain formulae outlined in ISO 7933:2004 Ergonomics of the thermal environment, to provide a graphical illustration and summary of predicted heat strain based on user entered data. The application may also be used to analyse methods of reducing or managing thermal risk associated with a task or environment. However, the application is to be used as a guide only. It does not provide safe/ unsafe working limits. A number of factors are not included in this assessment, such as: employee health conditions and the use of high level PPE (impermeable suits). There are limitations to the predicted heat strain calculations, once you approach the defined parameters outlined in Table A.1 within ISO 7933:2004. For more information about the application and to access a downloadable user guide for the application visit the Website at http://ergonomics.uq.edu.au/PHS/index.html. The development of this application was funded via a joint study between The University of Queensland, Faculty of Science and Rio Tinto. Developed at Stellar Science LTD.
Prime Ecosystem
A cloud-based platform designed to help businesses in the insurance, construction, and maintenance sectors manage their entire job lifecycle. Streamline operations, enhance efficiency, and drive business growth.
- Cloud-based platform
- Job lifecycle management
- Industry-specific tools
- Business growth features
- Profitability enhancement
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Designed for the Insurance, Construction, and Maintenance Industries, our easy to use cloud based platform Prime Ecosystem will enable you manage all aspects of your job lifecycle, helping you to grow your business and profits.
Screenshots
Verdict
The clearest difference is update cadence: Prime Ecosystem at every 2 months against PHS's every 11 months. PHS's advantage is iOS requirement (8.0 vs 13.0). On price, ads, in-app purchases and monetization model 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.
PHS ships an update every 11 months, Prime Ecosystem every 2 months. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.
| Parameter | PHS | Prime Ecosystem |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 4 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Kelly Johnstone | DevCon Technologies |
Customer experience
PHS
Prime Ecosystem
In-app purchases
PHS
No in-app purchases
Prime Ecosystem
No in-app purchases









