# CO2 Monitor 2

> CO2 Monitor 2 (iPhone/iPad app by himpel.)

- Source: https://appshunter.io/ios/app/co2-monitor-2/id6711338246 (this page in markdown: same URL + `.md`)
- Developer: [himpel](https://appshunter.io/developer/1497661154)
- Category: Lifestyle, Weather
- Price: Free
- Age rating: 4+
- Requires: iOS 13.4 · 34 MB
- Languages: American English, Korean
- Released: 2024-10-07
- Data updated: 2026-06-12
- User reviews in markdown: https://appshunter.io/ios/app/co2-monitor-2/id6711338246/reviews.md

## What is 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!


## Version history (last 5 releases)

### 1.0.6 — 2025-07-24

- Updated the website link for CO2 hazard standards.

### 1.0.5 — 2025-04-21

Changing the Device Scan Process

### 1.0.4 — 2024-12-23

[ ver 1.0.4 ]
- Change App Name

### 1.0.3 — 2024-12-18

[ ver. 1.0.3 ]
- Modifying the numerical area of the sensor in the main sensor screen

### 1.0.2 — 2024-11-19

[v.1.0.2]

The app name and logo have been changed.

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| --- | --- | --- | --- |
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## More apps by himpel

- [힘펠 AiroT](https://appshunter.io/ios/app/airot/id6743196476)

All apps by himpel: https://appshunter.io/developer/1497661154

## Related topics

[co2 monitor 2](https://appshunter.io/ios/topics/co2-monitor-2) · [co2 check](https://appshunter.io/ios/topics/co2-check) · [co2 catcher](https://appshunter.io/ios/topics/co2-catcher) · [co2 sensor](https://appshunter.io/ios/topics/co2-sensor) · [co2 detector](https://appshunter.io/ios/topics/co2-detector)

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*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 2026-06-12.*