# PHS vs Prime Ecosystem

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.

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 October 5, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | PHS | Prime Ecosystem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/phs/id1148768952/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 4 MB | 70 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Johnstone](https://appshunter.io/developer/1148768951) | [DevCon Technologies](https://appshunter.io/developer/1474568435) |

## What reviewers say

### PHS

[App page](https://appshunter.io/ios/app/phs/id1148768952)

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.

**Highlights:** Thermal risk analysis, Predicted heat strain calculations, ISO 7933:2004 formula application, Graphical illustration of heat strain, Thermal risk management guidance

**Features:** macOS Compatibility

**In-app purchases:** none


### Prime Ecosystem

[App page](https://appshunter.io/ios/app/prime-ecosystem/id1474568436)

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.

**Highlights:** Cloud-based platform, Job lifecycle management, Industry-specific tools, Business growth features, Profitability enhancement

**In-app purchases:** none


## Frequently asked questions

### Is PHS free?

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

### Is Prime Ecosystem free?

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

### Do PHS or Prime Ecosystem have ads?

Neither PHS nor Prime Ecosystem shows ads.

### Which is updated more often, PHS or Prime Ecosystem?

PHS ships an update every 11 months, and Prime Ecosystem every 2 months. Most recently, PHS was updated on October 5, 2026 and Prime Ecosystem on October 11, 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.*