The first "Heat Index" tool that uses the Lans P. Rothfusz equation.

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.

- 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.

If you need help please do not hesitate to contact us at, or visit
If you like the App, don't forget to leave us a comment on the App Store.

What’s New

Version 1.2

+ Fixed a problem on iPad 10.2", the preferred location would not be loaded once selected

Ratings and Reviews

4.5 out of 5
2 Ratings

2 Ratings

RLNfirst ,

Unique design Heat Index app

Thanks to the Developer for putting out a very unique outstanding design 5 star app! This app not only gives you and myself the Heat Index information for our area you and myself are in. But I find not only is the information for my area as they say correct but the Developer shows it in a beautiful unique way that is of 5 star quality! I hope you will download this app today now! I don’t think you will be disappointed or sorry! (Really) once again I thank the Developer it really really is a nice app! Thanks

App Privacy

The developer, Elton Nallbati, 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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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