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  • CO2 Monitor 2 screenshot 1
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About CO2 Monitor 2

CO2 Monitor – Best tool for indoor air quality CO2 monitors measure indoor carbon dioxide (CO2) concentrations in real time to help maintain a pleasant environment. Carbon dioxide is a colorless, tasteless gas that has little toxicity, but when it is concentrated, the air inside the room becomes cloudy, which can cause discomfort and health problems. It can be more dangerous, especially for the elderly and pregnant women. The human body effects of CO2 concentration: ~450 ppm: Clean outdoor air level 450 to 700 ppm: adequate indoor air with no health problems 700 to 1,000 ppm: levels that may offend some people 1,000 to 2,000 ppm: Concentration of drowsiness and condition changes 2,000 to 3,000 ppm: A level that can cause health damage such as stiff shoulders and headaches More than 3,000 ppm: Severe symptoms such as headache, dizziness and long-term health hazard (Source: Korea Association of Pacific Architecture) CO2 concentration rating in the app: ~700 ppm: Good – pleasant indoor environment 700 to 1,000 ppm: Normal – air quality needs to be improved 1,000 to 1,500 ppm: Bad – air quality deteriorates and health care is required More than 1,500 ppm: Very Bad – Immediate Ventilation Required Check indoor air quality in real time and stay healthy with CO2 monitors!

What’s new

Version 1.0.6 · Updated July 24, 2025

- Updated the website link for CO2 hazard standards.

App privacy

The developer, himpel, reported these privacy practices to Apple.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Location: Precise Location, Coarse Location

Used for: App Functionality

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