# Heat Index Calculator - Calc — Felt Air, Apparent Temperature

> Calculates heat index from air temperature and relative humidity. (iPhone/iPad app by Phan Nhat Đang.)

- Source: https://appshunter.io/ios/app/heat-index-calculator-calc/id1522851653 (this page in markdown: same URL + `.md`)
- Developer: [Phan Nhat Đang](https://appshunter.io/developer/1437390098)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 4.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 8 MB
- Languages: English
- Released: 2020-07-11
- Data updated: 2026-06-07
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/heat-index-calculator-calc/id1522851653/reviews.md

## What is Heat Index Calculator?

Use this App to calculate Heat Index. You only need to enter Air Temperature and Relative Humidity, the rest is ours.
We also support many different temperature units: Kelvin, Celsius (° C), Fahrenheit (° F)

DISCLAIMER:
This app is a calculation tool and the results are for reference only. Users should verify the information carefully before making any decisions.

We are very happy to serve you. If you have any requests, don't hesitate to contact us.
- https://www.facebook.com/phan.nhatdang.3/
- phannhatd@gmail.com

## Key features

- Heat Index Calculation
- Air Temperature Input
- Relative Humidity Input
- Multiple Temperature Units
- Kelvin, Celsius, Fahrenheit Support

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all features | $1.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/heat-index-calculator-calc/id1522851653/reviews.md

### 1/5 — Pay to use

*2023-09-06*

You have to pay for using celsius.

## Frequently asked questions about Heat Index Calculator

### What is the Heat Index Calculator app?

The Heat Index Calculator app allows you to easily determine the heat index by providing air temperature and relative humidity. It supports various temperature units for your convenience.

### What temperature units does Heat Index Calculator support?

Heat Index Calculator supports Kelvin, Celsius (°C), and Fahrenheit (°F) for temperature input and calculations.

### Is Heat Index Calculator free to use?

Yes, Heat Index Calculator is free to download and use. It also includes in-app purchases.

### Does Heat Index Calculator have ads?

Yes, Heat Index Calculator contains advertisements.

### What devices is Heat Index Calculator available on?

Heat Index Calculator is available on iPhone, iPad, and iPod devices.

### What is the age rating for Heat Index Calculator?

Heat Index Calculator has an age rating of 4+.

### How accurate are the results from Heat Index Calculator?

The app is a calculation tool, and the results are for reference only. Users should verify the information carefully before making any decisions.

### When was Heat Index Calculator last updated?

Heat Index Calculator was last updated on May 26, 2026, with version 1.6.0.

## Version history (last 5 releases)

### 1.6.0 — 2026-05-26

Bug fixes and performance improvements

### 1.5.0 — 2026-04-24

Bug fixes and performance improvements

### 1.4.0 — 2023-07-06

Bug fixes and performance improvements

### 1.3.0 — 2021-06-30

Bug fixes and performance improvements

### 1.1.0 — 2020-09-21

Bug fixes and performance improvements

## Apps similar to Heat Index Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Thermometer](https://appshunter.io/ios/app/thermometer/id357949214) | 4.4 (3,915) | Free | Utilities |
| [Dew Point Humidity Calculator](https://appshunter.io/ios/app/dew-point-humidity-calculator/id6480256120) | 4.6 (52) | Free | Utilities |
| [Fahrenheit Celsius Calculator](https://appshunter.io/ios/app/fahrenheit-celsius-calculator/id1245700611) | 4.6 (1,615) | Free | Utilities |
| [Temp Stick](https://appshunter.io/ios/app/temp-stick/id1137756208) | 3.7 (89) | Free | Utilities |
| [Material Estimator Calculator](https://appshunter.io/ios/app/material-estimator-calculator/id376071081) | 4.8 (2,927) | Free | Utilities |
| [Temperature Thermometer App](https://appshunter.io/ios/app/temperature-thermometer-app/id1617617056) | 1.5 (1,305) | Free | Utilities |

## More apps by Phan Nhat Đang

- [Compound Interest Calc: Growth](https://appshunter.io/ios/app/compound-interest-calc-growth/id1437390099)
- [Weight loss journal, diary](https://appshunter.io/ios/app/weight-loss-journal-diary/id1455057273)
- [Basic grocery list + price](https://appshunter.io/ios/app/basic-grocery-list-plus-price/id1477000933)
- [GFR Calculator - eGFR Calc](https://appshunter.io/ios/app/gfr-calculator-egfr-calc/id1485507590)
- [Auto Loan Calculator - Car](https://appshunter.io/ios/app/auto-loan-calculator-car/id1487930075)
- [Mortgage Calculator: Payment](https://appshunter.io/ios/app/mortgage-calculator-payment/id1489668528)

All apps by Phan Nhat Đang: https://appshunter.io/developer/1437390098

## Related topics

[heat index](https://appshunter.io/ios/topics/heat-index)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-07.*