Comparison

PHS vs Prestart Checks

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Thermal risk analysis
  • Predicted heat strain calculations
  • ISO 7933:2004 formula application
  • Graphical illustration of heat strain
  • Thermal risk management guidance
Features
Read full description

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.

About

Prestart Checks

Streamline pre-start vehicle inspections with customizable checklists. Ensure compliance, manage critical failures, and track repairs efficiently. Integrates with telematics for comprehensive fleet management.

Highlights
  • Customizable checklists
  • Chain of Responsibility compliance
  • Vehicle failure management
  • Repairer allocation
  • Repair reporting
  • Audit export
  • Telematics integration
Features
Read full description

Configurable Prestart Check Application - Customisable checklists - Chain of Responsibility Compliance - Critical vehicle failure management - Repairer allocation - Repair Reporting - Audit Export - Integration to Mix Telematics

Screenshots

PHS4 screens
Prestart Checks4 screens

Verdict

The call

The clearest difference is update cadence: Prestart Checks at every 6 weeks against PHS's every 11 months. PHS's advantage is iOS requirement (8.0 vs 11.4). 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

PHS ships an update every 11 months, Prestart Checks every 6 weeks. The most recent releases landed on October 23, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
PHS versus Prestart Checks: the parameters behind the verdict, then further details
ParameterPHSPrestart Checks
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 11 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better11.4
Further details — not scored
Size4 MB34 MB
Age rating4+4+
DeveloperKelly JohnstoneINTELLIFLEET PTY LTD

Customer experience

PHS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Prestart Checks

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PHS

No in-app purchases

None

Prestart Checks

No in-app purchases

Questions

Is PHS free?
PHS is free to download, with no in-app purchases.
Is Prestart Checks free?
Prestart Checks is free to download, with no in-app purchases.
Do PHS or Prestart Checks have ads?
Neither PHS nor Prestart Checks shows ads.
Which is updated more often, PHS or Prestart Checks?
PHS ships an update every 11 months, and Prestart Checks every 6 weeks. Most recently, PHS was updated on October 23, 2026 and Prestart Checks on October 16, 2026.

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