Heat Index & Category Calc

Heat Index & Category Calc

Heat category for safety

2 ratings
25 reviews
#118 in paid Weather
✈️ Travel
☀️ Weather
$0.99

Details

  • Released
  • Updated
  • May 14, 2010
  • May 8, 2026

Features

Heat Index & Category Calc screenshot #1 for iPhone
Heat Index & Category Calc screenshot #2 for iPhone
Heat Index & Category Calc screenshot #3 for iPhone
iphone
ipad
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About

This app calculates the perceived temperature by considering both air temperature and relative humidity. It provides a heat category to help users determine necessary precautions when outdoors, especially in high temperatures and humidity.

Perceived temperature calculation
Heat category for safety
Considers air temperature and humidity
Email results
Fahrenheit and Celsius support
Automatic US weather data fetch
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What's New in Heat Index & Category Calc

8.2

May 8, 2026

This update makes the app easier to use when the weather turns heavy and you want a quick answer. - The Heat Index screen is cleaner and easier to read at a glance. - Temperature and humidity entry is simpler to work with. - The keyboard now dismisses more naturally when you tap outside the fields. - A Done button is available on the keyboard for faster input cleanup. - NOAA weather and nearby station data are easier to get to from the same place. - Station browsing is smoother when you want a local weather check. - Observation details are laid out so the useful information appears first. - Forecast and observation sections are easier to scan on iPhone and iPad. - Search inside station data is better for long pages and dense readings. - The app makes it easier to compare current weather, nearby stations, and forecast details. - Heat index values remain available in both Fahrenheit and Celsius for quick checks. - Local values stay saved so repeat use is faster. - The result is a cleaner path from input to answer. This release also makes the station experience feel more like a weather tool and less like raw data. - XML-style document noise is hidden from the main view. - Weather content is presented in cleaner, more readable sections. - Station observations are easier to scan before you head outside. - Forecast information is easier to compare with current conditions. - Nearby station data is simpler to read, especially on a smaller screen. - The app keeps the focus on the data people actually need. - It is easier to move from a location check to a station check without losing context. - The station view now feels more like something you can use in real life, not something you have to decode. The update also improves the everyday flow of the app. - Manual entry is still there when you already know the numbers. - Current location checks are easier to compare with nearby NOAA stations. - The calculator is easier to reach when you need a fast answer. - The weather information is laid out more like a utility and less like a report. - You can get from temperature to heat index to station data with less friction. - It is easier to keep moving when you are outside and checking conditions on the go. - The app stays practical for work, sports, travel, and summer planning. - The result is a faster check before you head into the heat. It is a better fit for outdoor work, sports, travel, and summer planning. - Less friction when you are checking conditions on the go. - Better for humidity-heavy days when the air feels worse than the forecast. - Better for users who want a practical weather app without extra noise. - Better for quick checks before a run, a game, a shift, or a drive. - Better for anyone who wants a heat safety tool that feels easy to trust. - Better for comparing local weather, station data, and forecast context in one place. - Better for people who want weather information they can use right away. - Better for a routine that starts with a quick local reading instead of guesswork. You should notice that the app now reads more like a weather utility and less like a pile of raw data. The station experience is clearer, the calculator is easier to reach, and the results are easier to understand without stopping to decode them. The update also stays aligned with common searches and everyday use: - heat index - NOAA forecast - weather station - station data - humidity - temperature - weather safety - outdoor weather - summer heat - local weather - heat stress - weather station observations If you use the app to check conditions before heading outside, this update should feel like less friction and more signal. It is the same practical tool, just easier to read and easier to trust when the day turns hot.

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Charts

Top Paid

📈 118+1

Weather

This app rose +1 position in Weather chart.

Last updated on July 19, 2026.

User reviews

Location information is useful

Heat index to the location is a great addition

Not very good.

Tried using this for HVAC conversion for helping customers to understand what the temp actually feels like. They should put in the advertising that this program can only work with temps above 80. Not good

Really helpful for spring and summer changes

New graphics make it look nice. Updates fix some issues...

Great app overall.

Army Medic Approved

As a Combat Medic, this was totally worth the dollar I spent. Now when my Training Officer asks what the Heat Cat is, I don't have to even leave my vehicle!!

Great... I think...

This app really works well but I which it would give me some idea of where it is using as a location for reporting the heat index. I touch "fetch", it gives the heat index, and I'm left wondering if it's for Phoenix or Tampa. I'm a pilot by trade and I may see 5 cities in a day and it'd be nice to have some idea of the location it's using.

Some idea of the time stamp it's using would also be nice. Is the heat index for now or three hours ago?
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Developer apps

FAQ

What is the Heat Index & Heat Category app used for?

The Heat Index & Heat Category app calculates the perceived temperature by factoring in both air temperature and relative humidity. It then provides a heat category to help users understand the level of caution needed when spending time outdoors.

How accurate is the Heat Index & Heat Category app?

The app provides a good estimate of perceived temperature by considering air temperature and relative humidity. It is most effective when temperatures are at least 80°F / 26°C and humidity is at least 40%.

What devices support the Heat Index & Heat Category app?

The Heat Index & Heat Category app is a universal app that supports iPhone, iPad, and iPod Touch devices. It is designed to work with all screen sizes for these devices.

Can I share my heat index calculations from the app?

Yes, you can email your calculations or conversions directly from the Heat Index & Heat Category app using a prewritten template through your device's email application.

Does the Heat Index & Heat Category app work offline?

The app automatically fetches weather data inside the USA when the FETCH button is pressed. It is not explicitly stated if it functions offline for calculations once data is fetched.

What is the price of the Heat Index & Heat Category app?

The Heat Index & Heat Category app is available for a one-time purchase price of $0.99.

How often is the Heat Index & Heat Category app updated?

The latest version of the app is 7.0, and it was last updated on May 27, 2025. It supports the latest version of iOS.

What is the age rating for the Heat Index & Heat Category app?

The Heat Index & Heat Category app has an age rating of 4+, making it suitable for young children and up.