# HotHog

> Thermal comfort and stress predictions for sows, with management insights. (iPhone/iPad app by Purdue University.)

- Source: https://appshunter.io/ios/app/hothog/id6444026437 (this page in markdown: same URL + `.md`)
- Developer: [Purdue University](https://appshunter.io/developer/371741257)
- Category: Weather
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 18.6 · 19 MB
- Languages: American English
- Released: 2023-04-08
- Data updated: 2026-08-28
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/hothog/id6444026437/reviews.md

## What is HotHog?

HotHog provides hourly and daily predictions of thermal comfort and stress in non-pregnant, mid-gestation, and late-gestation sows based upon a decision support tool developed through a USDA National Institute of Food and Agriculture grant by scientists with the USDA Agricultural Research Service, the University of Illinois, and Purdue University. Specific HotHog features are:

•	Thermal index categories include: cool, comfortable, warm, mild heat stress, moderate heat stress, and severe heat stress.
•	Users can set specific geographical locations and may refer to their current location for predictions. 
•	HotHog provides hourly and daily temperature predictions along with daily precipitation predictions.
•	Physiological and behavioral changes associated with each thermal index category are provided by selecting the pig icon.
•	Management observations and mitigation options associated with each thermal index category are provided by selecting the fan icon.
•	By selecting the paper and pencil icon, users can build their own thermal index through temperature, gestation stage, and relative humidity inputs.
•	The gear icon takes the user to a settings page where they can: 1) edit their individual profile, 2) set preferences such as dark/light mode or Fahrenheit/Celcius, 3) find information on how the decision support tool and HotHog were developed, 4) make considerations for use of HotHog, and 5) report problems with HotHog or ask specific questions pertaining to swine thermal stress.

## Key features

- Hourly and daily thermal comfort predictions
- Thermal index categories (cool to severe heat stress)
- Physiological and behavioral change information
- Management observations and mitigation options
- Customizable thermal index builder
- Location-based predictions
- Temperature and precipitation forecasts


## Frequently asked questions about HotHog

### What is HotHog?

HotHog provides hourly and daily predictions of thermal comfort and stress for sows. It's a decision support tool developed by scientists from USDA Agricultural Research Service, the University of Illinois, and Purdue University.

### What thermal index categories does HotHog use?

HotHog categorizes thermal conditions into cool, comfortable, warm, mild heat stress, moderate heat stress, and severe heat stress. Each category includes associated physiological changes and management recommendations.

### Can I customize predictions in HotHog?

Yes, users can build their own thermal index by inputting temperature, gestation stage, and relative humidity. This allows for personalized predictions based on specific farm conditions.

### Does HotHog offer precipitation forecasts?

Yes, HotHog provides daily precipitation predictions along with hourly and daily temperature forecasts. This helps users anticipate weather impacts on their operations.

### What devices does HotHog support?

HotHog is currently supported on iPhones. It was released on April 8, 2023, and its latest version is 1.3.3, last updated on November 7, 2025.

### How is HotHog developed and updated?

HotHog was developed through a USDA National Institute of Food and Agriculture grant. The app is updated regularly, with the latest version released on November 7, 2025.

### What is the age rating for HotHog?

HotHog has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### How can I report problems or ask questions about HotHog?

You can report problems or ask specific questions pertaining to swine thermal stress through the settings page in HotHog by selecting the gear icon. This section also provides information on the decision support tool's development.

## Version history (last 5 releases)

### 1.3.3 — 2025-11-07

Updated for recent OS release.

### 1.3.2 — 2025-01-28

Additional text modifications.

### 1.3.1 — 2025-01-18

Cosmetic changes.

### 1.2.1 — 2024-10-01

Upgraded weather protocol.

### 1.2.0 — 2024-09-27

Improved alert and user processing.

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All apps by Purdue University: https://appshunter.io/developer/371741257

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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 2026-08-28.*