# HumProbCalc (N)

> HumProbCalc (N) (iPhone/iPad app by Ivan Miguel Serrano Pires.)

- Source: https://appshunter.io/ios/app/humprobcalc-n/id654748913 (this page in markdown: same URL + `.md`)
- Developer: [Ivan Miguel Serrano Pires](https://appshunter.io/developer/654748916)
- Category: Weather, Utilities
- Price: $1.99
- Age rating: +4
- Requires: iOS 15.0 · 4 MB
- Languages: American English
- Released: 2013-06-03
- Data updated: 2026-09-04
- User reviews in markdown: https://appshunter.io/ios/app/humprobcalc-n/id654748913/reviews.md

## What is HumProbCalc (N)?

HumProbCalc North is the field tool for estimating dead fuel moisture and fire ignition probability in seconds, based on temperature, relative humidity, shade, sun exposure, terrain slope and time of day.

KEY FEATURES

- Fast fuel moisture calculation from temperature and relative humidity
- Ignition probability calculation, combining humidity, shade, exposure and slope
- Support for three temperature units (ºC, ºF, ºK)
- Automatic location detection with place-name lookup
- History of all calculations, with date, time and location
- Simple, fast interface built for field use, even with poor connectivity
- Available in Portuguese, English, French and Spanish

WHO IT'S FOR

Built for firefighters, forest rangers, wildland fire crews, civil protection technicians, and anyone who needs to quickly assess forest fire risk on the ground.

Calculations are based on standard reference tables for dead fine fuel moisture and ignition probability used in forest fire risk assessment.


## Version history (last 5 releases)

### 4.0 — 2026-08-19

New design

### 3.0 — 2022-10-04

Better Performance

### 2.7 — 2018-10-02

Bug fixed

### 2.6 — 2017-02-14

Bug fixes

### 2.5 — 2015-01-06

Bug fixes

## More apps by Ivan Miguel Serrano Pires

- [HumProbCalc (S)](https://appshunter.io/ios/app/humprobcalc-s/id654774421)
- [iAccelerometer Capture](https://appshunter.io/ios/app/iaccelerometer-capture/id860264551)

All apps by Ivan Miguel Serrano Pires: https://appshunter.io/developer/654748916

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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 2026-09-04.*