Heat Index Pro
Heat Index Pro is #24 in Weather Paid in United Kingdom and charting in 5 of 24 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperLionsApp di Nallbati Elton
CategoryWeather
Price2.99 GBP
Released
Rating★ 3.5 (2)
Version1.3
Age rating4+
First seen by us
24 Sep 2026
Installs (est.)1k+ worldwide
Rating
3.5 ★
2 ratings
Measured
Best rank now
#24
Measured
Heat Index Pro on the App Store
App details
App ID
1480149233
Publisher
LionsApp di Nallbati Elton
Minimum OS
iOS 26.0+
Content rating
4+
Languages
14
DA NL EN FI FR DE IT JA NB PT RU ZH …
Size
14 MB
Heat Index Pro downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| WeatherPaid | #24 | |
| WeatherGrossing | #76 | |
| WeatherGrossing | #79 | |
| WeatherPaid | #85 | |
| WeatherPaid | #92 | |
| WeatherPaid | #84 | |
| WeatherPaid | #113 |
Apps near Heat Index Pro on the chart
Weather Paid, around #24.
Ratings
App Store, worldwide.
Rating
3.5 ★
2 ratings
Measured
Ratings
2
Measured
About Heat Index Pro
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 [email protected], or visit www.lionsapp.com
If you like the App, don't forget to leave us a comment on the App Store.
[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 [email protected], or visit www.lionsapp.com
If you like the App, don't forget to leave us a comment on the App Store.
Latest updates
1.3
+ 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)
1.2