---
title: "CO2 Check - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Remotely monitor the carbon dioxide levels on your CO2 Check devices. Get real-time readings and receive push notifications when your levels reach unhealthy levels. Know when ventilation needs to be i"
---

# CO2 Check — United States
> Be Aware Of Your Air

![CO2 Check App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple126/v4/15/64/be/1564be2c-e230-2fd1-4475-0a87714d2955/AppIcon-0-0-1x_U007emarketing-0-0-0-7-0-0-sRGB-0-0-0-GLES2_U002c0-512MB-85-220-0-0.png/434x0w.png)

**Developer:** [CO2 CHECK](https://apptail.io/developer/co2-check-jwee)
**Category:** Lifestyle
**Rating:** 2.8/5 (15 ratings)
**Price:** Free
**Bundle ID:** com.co2check.ios
**Store:** Apple App Store
**Country:** United States
**Version:** 1.0 (released 2021-10-21)
**Original Release:** 2021-10-21
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1578623635)
**AppTail Page:** [https://apptail.io/app/co2-check-wRz/united-states](https://apptail.io/app/co2-check-wRz/united-states)

## CO2 Check Description
Remotely monitor the carbon dioxide levels on your CO2 Check devices. Get real-time readings and receive push notifications when your levels reach unhealthy levels. Know when ventilation needs to be improved or windows need to be opened. Keep an eye on your CO2 Check device readings from a different room, a different building or even a different city!

## CO2 Check Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/33/5b/79/335b79a1-8a1b-9f27-49a6-c4e14dc7c500/2522b532-9183-483f-8f0a-3ee4e49b183b_Asset_19.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/02/53/c7/0253c73f-1e98-6259-173c-fb079ef86623/17a41bc1-f6d2-4b23-b194-c3fca7d17c0a_Asset_17.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/d2/23/9d/d2239dac-0d51-8e10-3ab6-bc8d645ef14f/defeee37-a131-4d92-afbc-dacba4a2729c_Asset_16.png/1284x2778.png)

## CO2 Check Rating Breakdown in United States
- 5 stars: 5 (33%)
- 4 stars: 1 (7%)
- 3 stars: 2 (13%)
- 2 stars: 0 (0%)
- 1 stars: 7 (47%)

## CO2 Check Reviews in United States

### *---- "VERY BADDDDD"
It doesn’t work, don’t use it, don’t download it, it’s a waste of time
-- Colton’s Reveiws, 2025-03-23

### *---- "THE APP DOES NOT WORK!!"
This is my first time ever using the app….ever. After downloading, I went to create an account when I got to the password it said the password that I created didn’t work!!! I then tried to change it(although I am new to the app) after erasing password and replacing it with new one it says my email address already has a exiting account. I thought that was strange, so I then go to log in and press “forgot password” and get a notification saying email with instructions have been sent! But I never actually got a email to reset. Sooo then I tried the exact same thing with 3 different email addresses and got the same results 3 different times!! There a glitch or error, somebody needs to fix it!!
-- Qu33nBree, 2024-06-25

[View all CO2 Check reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## CO2 Check Discovered Keywords
- co2
- co2 check

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## CO2 Check Available In
- [United States](https://apptail.io/app/co2-check-wRz/united-states)
- [Canada](https://apptail.io/app/co2-check-wRz/canada)
- [Hungary](https://apptail.io/app/co2-check-wRz/hungary)
- [Netherlands](https://apptail.io/app/co2-check-wRz/netherlands)
- [Australia](https://apptail.io/app/co2-check-wRz/australia)
- [Azerbaijan](https://apptail.io/app/co2-check-wRz/azerbaijan)
- [Belgium](https://apptail.io/app/co2-check-wRz/belgium)
- [Brazil](https://apptail.io/app/co2-check-wRz/brazil)
- [Belarus](https://apptail.io/app/co2-check-wRz/belarus)
- [Switzerland](https://apptail.io/app/co2-check-wRz/switzerland)
- [Chile](https://apptail.io/app/co2-check-wRz/chile)
- [China](https://apptail.io/app/co2-check-wRz/china)
- [Colombia](https://apptail.io/app/co2-check-wRz/colombia)
- [Czechia](https://apptail.io/app/co2-check-wRz/czechia)
- [Germany](https://apptail.io/app/co2-check-wRz/germany)
- [Denmark](https://apptail.io/app/co2-check-wRz/denmark)
- [Dominican Republic](https://apptail.io/app/co2-check-wRz/dominican-republic)
- [Algeria](https://apptail.io/app/co2-check-wRz/algeria)
- [Ecuador](https://apptail.io/app/co2-check-wRz/ecuador)
- [Egypt](https://apptail.io/app/co2-check-wRz/egypt)
- [Spain](https://apptail.io/app/co2-check-wRz/spain)
- [Finland](https://apptail.io/app/co2-check-wRz/finland)
- [France](https://apptail.io/app/co2-check-wRz/france)
- [United Kingdom](https://apptail.io/app/co2-check-wRz/united-kingdom)
- [Greece](https://apptail.io/app/co2-check-wRz/greece)
- [Hong Kong SAR China](https://apptail.io/app/co2-check-wRz/hong-kong)
- [Croatia](https://apptail.io/app/co2-check-wRz/croatia)
- [Indonesia](https://apptail.io/app/co2-check-wRz/indonesia)
- [Ireland](https://apptail.io/app/co2-check-wRz/ireland)
- [Israel](https://apptail.io/app/co2-check-wRz/israel)
- [India](https://apptail.io/app/co2-check-wRz/india)
- [Italy](https://apptail.io/app/co2-check-wRz/italy)
- [Japan](https://apptail.io/app/co2-check-wRz/japan)
- [South Korea](https://apptail.io/app/co2-check-wRz/south-korea)
- [Kuwait](https://apptail.io/app/co2-check-wRz/kuwait)
- [Kazakhstan](https://apptail.io/app/co2-check-wRz/kazakhstan)
- [Lebanon](https://apptail.io/app/co2-check-wRz/lebanon)
- [Sri Lanka](https://apptail.io/app/co2-check-wRz/sri-lanka)
- [Luxembourg](https://apptail.io/app/co2-check-wRz/luxembourg)
- [Latvia](https://apptail.io/app/co2-check-wRz/latvia)
- [Mexico](https://apptail.io/app/co2-check-wRz/mexico)
- [Malaysia](https://apptail.io/app/co2-check-wRz/malaysia)
- [Nigeria](https://apptail.io/app/co2-check-wRz/nigeria)
- [Norway](https://apptail.io/app/co2-check-wRz/norway)
- [Nepal](https://apptail.io/app/co2-check-wRz/nepal)
- [New Zealand](https://apptail.io/app/co2-check-wRz/new-zealand)
- [Peru](https://apptail.io/app/co2-check-wRz/peru)
- [Philippines](https://apptail.io/app/co2-check-wRz/philippines)
- [Pakistan](https://apptail.io/app/co2-check-wRz/pakistan)
- [Poland](https://apptail.io/app/co2-check-wRz/poland)
- [Portugal](https://apptail.io/app/co2-check-wRz/portugal)
- [Romania](https://apptail.io/app/co2-check-wRz/romania)
- [Russia](https://apptail.io/app/co2-check-wRz/russia)
- [Saudi Arabia](https://apptail.io/app/co2-check-wRz/saudi-arabia)
- [Sweden](https://apptail.io/app/co2-check-wRz/sweden)
- [Singapore](https://apptail.io/app/co2-check-wRz/singapore)
- [Slovenia](https://apptail.io/app/co2-check-wRz/slovenia)
- [Thailand](https://apptail.io/app/co2-check-wRz/thailand)
- [Türkiye](https://apptail.io/app/co2-check-wRz/turkey)
- [Taiwan](https://apptail.io/app/co2-check-wRz/taiwan)
- [Ukraine](https://apptail.io/app/co2-check-wRz/ukraine)
- [Uzbekistan](https://apptail.io/app/co2-check-wRz/uzbekistan)
- [Vietnam](https://apptail.io/app/co2-check-wRz/vietnam)
- [United Arab Emirates](https://apptail.io/app/co2-check-wRz/united-arab-emirates)
- [South Africa](https://apptail.io/app/co2-check-wRz/south-africa)
- [Armenia](https://apptail.io/app/co2-check-wRz/armenia)
- [Argentina](https://apptail.io/app/co2-check-wRz/argentina)
- [Austria](https://apptail.io/app/co2-check-wRz/austria)

---

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