244+ iOS apps curated and reviewed
Out of 244+ heat index calculator pro apps on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.7★ (52) | No | Yes | Jul 2026 |
| 2 |  | Free | — | No | No | Jul 2026 |
| 3 |  | Free | 4.0★ (1) | Yes | Yes | May 2026 |
| 4 |  | Free | 2.5★ (292) | No | No | Jul 2026 |
| 5 |  | $2.99 was $3.99 | 5.0★ (1) | No | No | Jul 2026 |
| 6 |  | Free | 4.9★ (404K) | Yes | No | Jul 2026 |
| 7 |  | Free | 4.6★ (1.8K) | Yes | Yes | Jul 2026 |
| 8 |  | Free | — | No | No | Jul 2026 |
Instantly determine how hot it truly feels by combining temperature and humidity. This app provides real-time weather data, forecasts, and heat risk warnings to help you plan outdoor activities safely and avoid heat-related illnesses.
Calculate the heat index by simply inputting air temperature and relative humidity. Supports multiple temperature units including Kelvin, Celsius, and Fahrenheit. Results are for reference only.
This tool helps outdoor workers stay safe by providing real-time heat index information and hourly forecasts specific to their location. It offers occupational safety recommendations and details on heat-related illnesses and their first aid.
This app provides real-time heat conditions and forecasts to help users avoid heat-related illness. It offers hourly and 7-day outlooks with clear risk level guidance, designed exclusively for users in the United States.
This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.
This tool helps prevent heat-related illnesses for outdoor workers by providing heat index and wet bulb temperature data. It offers current conditions and forecasts for US locations, using standardized risk level categorizations to help plan work activities and ensure safety.
Accurately calculate the heating requirements for any room in your home. This tool supports unlimited rooms, offers precise calculations in Watts and BTU, and features a clean, intuitive design with dark mode support.
This tool calculates the "felt air temperature" by combining air temperature and relative humidity using a specific scientific equation. It provides current weather conditions and allows users to search for and save favorite locations worldwide.
This app assists heating engineers and surveyors in collecting property data for heating system installations. It supports heat loss reports for various technologies and includes tools for sound assessments and quick estimations. Data is automatically saved for later review and amendment.
Calculate the heating load for simple rectangular buildings with natural air infiltration. Save calculations for future reference or email them directly from the app.
Calculate room heat loss, estimate radiator output, and convert between Watts and BTU/h. Analyze potential energy savings from home improvements and determine radiator sizing for optimal heating. Results can be emailed, saved, or exported.
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.
This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.
Perform calculations quickly and accurately with large buttons. Personalize the interface by selecting custom background and text colors. This straightforward utility is designed for intuitive use.
This app assists HVACR technicians with field service by providing calculations for superheat, subcooling, airflow, and psychrometrics. It supports 28 refrigerants and includes instructions for use.