Fire Behaviour Calculator vs ERG for iOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fire Behaviour Calculator
This app provides calculations for fire behavior based on established fuel and fire models. It's a useful tool for understanding fire dynamics, developed with support from the NZ fire service commission.
- Fuel and fire behavior models
- Scion Rural Fire Research models
- NZ fire service commission support
- User-friendly interface
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This user-friendly app incorporates the fuel and fire behaviour models developed by Scion's Rural Fire Research group, and supported by the NZ fire service commission.
ERG for iOS
This app provides first responders with quick access to critical information for hazardous materials transportation incidents. It features an indexed list of dangerous goods, including ID numbers, hazards, and safety precautions, aiding in effective response.
- Indexed list of dangerous goods
- ID number lookup
- General hazard information
- Recommended safety precautions
- Multi-language support (English, French, Spanish)
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PHMSA’s Emergency Response Guidebook (ERG) is the go-to resource for first responders during the initial phase of a dangerous goods or hazardous materials transportation incident. The ERG app is a valuable companion, based on the latest edition of the ERG, to help responders quickly access critical information at their fingertips. The app features an indexed list of dangerous goods, including their associated ID number, general hazards, and recommended safety precautions. In practical scenarios, such as responding to an overturned tractor trailer displaying a DOT hazmat placard, emergency responders can use the app to quickly identify the material associated with the placard and get guidance on how to respond effectively. Full versions available in English, French, and Spanish.
Screenshots
Verdict
The clearest difference is review sentiment: ERG for iOS at 100% against Fire Behaviour Calculator's 0%. ERG for iOS also leads on rating (4.8 vs 2.0) and ratings volume (65 vs 1). Fire Behaviour Calculator's advantage is iOS requirement (9.0 vs 12.0). On price, update cadence, ads and in-app purchases 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.
ERG for iOS holds the better App Store score, 4.8 against 2.0. That said, the two scores are not equally well evidenced: ERG for iOS has 65 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Fire Behaviour Calculator's written reviews are positive against 100% of ERG for iOS's.
Fire Behaviour Calculator ships an update every 9 months, ERG for iOS every 4 months. The most recent releases landed on October 3, 2026 and October 21, 2026 respectively.
| Parameter | Fire Behaviour Calculator | ERG for iOS |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) | 4.8 (65 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 65 — better |
| Update frequency | Every 9 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | — | #114 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 4 MB | 27 MB |
| Age rating | 4+ | 12+ |
| Developer | Scion | Pipeline and Hazardous Materials Safety Administration |
Customer experience
Fire Behaviour Calculator
ERG for iOS
In-app purchases
Fire Behaviour Calculator
No in-app purchases
ERG for iOS
No in-app purchases
Questions
Is Fire Behaviour Calculator free?
Is ERG for iOS free?
Which has better reviews, Fire Behaviour Calculator or ERG for iOS?
Do Fire Behaviour Calculator or ERG for iOS have ads?
Which is updated more often, Fire Behaviour Calculator or ERG for iOS?
Other comparisons
