# Calc-FDI

> Australian fire behavior prediction tool for bushfire professionals. (iPhone/iPad app by FTI (1997) Pty Ltd.)

- Source: https://appshunter.io/ios/app/calc-fdi/id530077646 (this page in markdown: same URL + `.md`)
- Developer: [FTI (1997) Pty Ltd](https://appshunter.io/developer/462573989)
- Category: Weather, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 16.4 · 36 MB
- Languages: American English
- Released: 2012-05-31
- Data updated: 2026-08-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calc-fdi/id530077646/reviews.md

## What is Calc?

CALC-FDI3 is designed to be used in Australia by Bush Fire Control Officers and members of Bush Fire Brigades. It makes use of the Australian Fire Danger Rating System models to predict fire behaviour for fires in the following environments: Grassland, Mallee Heath, Shrubland, Tasmanian Buttongrass, Spinifex and Spinifex Woodlands and Savanna Woodlands and  Eucalypt Forests. 
Calculate Fire Danger Ratings, Fire Behaviour Index, Rate of Spread, Flame Height and more. Works offline.  
CALC-FDI3 uses models are those released in conjunction with the new nation-wide Fire Danger Rating system commencing September 1st 2022

## Key features

- Predicts fire behavior for Australian environments
- Calculates Fire Danger Ratings
- Estimates Rate of Spread
- Estimates Flame Height
- Uses Australian Fire Danger Rating System models
- Works offline

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/calc-fdi/id530077646/reviews.md

### 4/5 — Two exact versions of this app?

*2023-08-26*

Why is there two exact versions of this app? Also this app doesn’t incorporate pine forest.

### 4/5 — M

*2017-02-21*

great tool and I use it inconjuction with my handheld fire meter

### 3/5 — Good idea

*2012-11-26*

This is a great idea but the forest fire danger rating is not calculating properly as the FDI does not change when the drought factor changes. Still needs work.

## Frequently asked questions about Calc

### What environments does Calc-FDI predict fire behavior for?

Calc-FDI predicts fire behavior for Grassland, Mallee Heath, Shrubland, Tasmanian Buttongrass, Spinifex and Spinifex Woodlands, and Savanna Woodlands and Eucalypt Forests.

### Does Calc-FDI require an internet connection to work?

No, Calc-FDI is designed to work offline, making it accessible even in areas with no network coverage.

### What specific fire metrics can Calc-FDI calculate?

Calc-FDI can calculate Fire Danger Ratings, Fire Behaviour Index, Rate of Spread, and Flame Height, among other metrics.

### Which fire danger rating system does Calc-FDI use?

Calc-FDI utilizes the models released in conjunction with the new nation-wide Fire Danger Rating system that commenced on September 1st, 2022.

### Is Calc-FDI available on Android devices?

Based on the provided data, Calc-FDI is supported on iPhone, iPad, and iPod. Android compatibility is not specified.

### How often is Calc-FDI updated?

The latest version, 3.23.1, was released on March 5th, 2023. This suggests a relatively active update schedule, though specific frequency is not detailed.

### What is the age rating for Calc-FDI?

Calc-FDI has an age rating of 4+, making it suitable for a wide range of users.

### Does Calc-FDI have ads?

No, the application does not contain advertisements.

## Version history (last 5 releases)

### 3.26.1 — 2026-06-04

Fixed font size issues on iPhones

### 3.26.0 — 2026-06-03

Some user interface changes including an option to switch to Dark Mode and increased font size

### 3.23.1 — 2023-03-05

Updated Eucalypt model to enable eastern Australian's to enter their own fuel load hazard scores. Fixed an issue in the button grass model

### 3.22.3 — 2022-12-19

Fix for Grassland Model when Wind Height is 2m

### 3.22.2 — 2022-12-06

Now compliant with the new nation-wide Fire Danger Rating system commencing September 1st 2022

## Apps similar to Calc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Weather Live Channal](https://appshunter.io/ios/app/weather-live-channal/id1438714065) | 3.3 (4) | Free | Weather |
| [FDR Calculator](https://appshunter.io/ios/app/fdr-calculator/id527055670) | — | Free | Weather |
| [Wild Fire Predictor](https://appshunter.io/ios/app/wild-fire-predictor/id6747255503) | — | Free | Weather |
| [MAPDEFIRE](https://appshunter.io/ios/app/mapdefire/id6746377146) | — | Free | Weather |
| [Aurorapulse](https://appshunter.io/ios/app/aurorapulse/id6739272774) | 5.0 (5) | Free | Weather |
| [Weather Fusion – PWS](https://appshunter.io/ios/app/weather-fusion-pws/id6752262591) | 5.0 (15) | Free | Weather |

## More apps by FTI (1997) Pty Ltd

- [Pocket PAM 2](https://appshunter.io/ios/app/pocket-pam-2/id528528766)
- [Mind My Assets 2](https://appshunter.io/ios/app/mind-my-assets-2/id1213260519)
- [agCOMMANDER](https://appshunter.io/ios/app/agcommander/id1536370593)
- [MetLog](https://appshunter.io/ios/app/metlog/id6526477515)
- [gpMapper](https://appshunter.io/ios/app/gpmapper/id6791440161)

All apps by FTI (1997) Pty Ltd: https://appshunter.io/developer/462573989

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*