# Humidity Calc

> Calculate theoretical indoor humidity from temp. Check humidifier filters.

Canonical page: [https://chrome-stats.com/d/com.humidity.calculator](https://chrome-stats.com/d/com.humidity.calculator)

## Overview

- **ID:** `com.humidity.calculator`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** ratel.okottel
- **Category:** TOOLS
- **Downloads:** 175
- **Version:** 1.6.6
- **Last updated:** 2026-08-15
- **First published:** 2026-01-31
- **Publisher country:** JP
- **Size:** 7.56 MB
- **Data as of:** 2026-09-20
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.humidity.calculator)
- **Website:** [https://ratel-okottel.com](https://ratel-okottel.com/)
- **Privacy policy:** [https://ratel-okottel.com/privacy/](https://ratel-okottel.com/privacy/)

## Description

【Calculate Theoretical Relative Humidity】<br><br>A humidity calculation app for managing indoor humidity and checking humidifier performance.<br><br>Calculate the theoretical indoor relative humidity from the outdoor temperature, outdoor relative humidity, and your indoor temperature.<br><br>By comparing the calculated value with your hygrometer reading, you can estimate humidification performance and determine when a humidifier filter may need replacement.<br><br>This app does not measure humidity.<br><br>【Key Features】<br><br>• Calculate theoretical indoor relative humidity<br>• Compare calculated and measured humidity<br>• Check humidifier performance<br>• Estimate humidifier filter deterioration and replacement timing<br>• Support daily indoor humidity management<br><br>【Recommended For】<br><br>• Users of evaporative humidifiers<br>• Anyone who wants to check humidifier performance<br>• Anyone who wants to know when to replace a humidifier filter<br>• People managing indoor humidity during dry seasons<br>• Anyone who wants to compare theoretical and measured humidity<br><br>【What Is Theoretical Relative Humidity?】<br><br>This app calculates the theoretical indoor relative humidity by converting outdoor relative humidity based on the amount of water vapor and applying the indoor temperature.<br><br>Comparing the theoretical value with your hygrometer reading helps you evaluate humidifier performance and estimate whether the filter has lost efficiency.<br><br>Ideal for users who want a simple way to monitor indoor humidity and maintain humidifier performance.

## Rankings

- #1,771,530 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.gms.permission.AD_ID`
- `com.humidity.calculator.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.humidity.calculator)