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Heat Index Pro
How hot it really feels
$2.99 · In‑App Purchases · Designed for iPad
The first "Heat Index" tool that uses the Lans P. Rothfusz equation.
[Description]
The heat index (HI) is an index that combines air temperature and relative humidity, in shaded areas, that is the feeling of "hot" or "cold" that is felt; it is due not only to the air temperature, but also to other environmental conditions, such as humidity and wind.
The heat index was developed in 1979 by Robert G. Steadman.
The computation of the heat index is a refinement of a result obtained by multiple regression analysis carried out by Lans P. Rothfusz and described in a 1990 National Weather Service (NWS) Technical Attachment (SR 90-23).
The heat index is also known as the "felt air temperature", "apparent temperature", "real feel" or "feels like".
The humidity in the air can increase the sensation of heat, while the wind can increase the sensation of cold.
For example, when the temperature is 32°C (90°F) with 70% relative humidity, the heat index is 41°C (106°F).
[How does it work]
Wherever you are, you will have the Heat Index, temperature, humidity and weather conditions.
Search for new locations and they will automatically be added to your favorites.
Make sure you have activated the location services on your device, at this point the App will detect your geographical position.
[Features]
- Heat Index calculated with the Rothfusz equation
- Temperature
- Humidity
- Effects of the Heat Index
- Choice of 3 units of measurement: celsius, fahrenheit and kelvin
- Map current location
- Search City (without limits)
- Save favorite places (without limits)
- Intuitive graphics
- Ease of use
[Supported languages]
English, Italian, Spanish, French, German, Portuguese, Dutch, Russian, Chinese, Japanese, Danish, Finnish, Norwegian, Swedish.
[Support]
If you need help please do not hesitate to contact us at info@lionsapp.com, or visit www.lionsapp.com
If you like the App, don't forget to leave us a comment on the App Store.
Events
+ Completely redesigned app (The app has been completely redesigned in both design and features)
+ Optimized for iOS 26 (The app is now optimized for iOS 26)
+ Liquid Glass (Say hello to Liquid Glass)
+ Landscape orientation support (You can now use the app with your devices in landscape orientation)
+ Rothfusz calculation with adjustment (For low temperature values, the simplified adjustment formula by Rothfusz is now used)
+ Heat index, temperature, humidity chart (We’ve added a 3‑day forecast chart for heat index, temperature, and humidity)
+ Upgrade to Pro (Get additional features by upgrading to the Pro version)
+ New weather data provider (Welcome, WeatherApi)
The developer, LionsApp di Nallbati Elton, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- LionsApp di Nallbati Elton
- Size
- 13.9 MB
- Category
- Weather
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 13 more
- English, Danish, Dutch, Finnish, French, German, Italian, Japanese, Norwegian Bokmål, Portuguese, Russian, Simplified Chinese, Spanish, Swedish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro $1.99
- Copyright
- © lionsapp.com