AQCheck 4+

how's your air‪?‬

Scott Kilbourn

Designed for iPad

    • 3.5 • 4 Ratings
    • Free
    • Offers In-App Purchases



What is the air quality in your area?

AQCheck uses air quality information from the worldwide network of PurpleAir monitors. PurpleAir is a company that makes low-cost​ air quality monitors available to the public. For more information, check out

With AQCheck, you can check the air quality of almost 4500 monitors placed around the world. AQCheck provides an Air Quality Index value based on calculations done by the US Environmental Protection Agency. The high-quality build of PurpleAir monitors results in accurate readings all the time. And because PurpleAir monitors update every couple of minutes, you'll always have the latest information about the air quality in your area.


- Search a list of almost 4500 air quality monitors on the PurpleAir network. Search by monitor name or monitor ID.
- Select any number of sensors for the watchlist and see their air quality at a glance.
- Use colors to make it easy to determine how bad the air is.
- Tap on monitor information screen to go to the location on the PurpleAir map.
- Most PurpleAir monitors have two sensors. See detailed monitor information and breakdown of data for each sensor.
- View history information for each monitor, to see the air quality trend.
- Set number of minutes between refreshing data, or choose to not automatically refresh.

The author of this app and MileHighApps are not affiliated with PurpleAir. We don't make or sell air monitors. The author is an "air quality enthusiast."
Though there are currently almost 4500 PurpleAir monitors stationed around the world, not all areas are covered and some smaller areas have many monitors. PurpleAir provides low-cost monitors to the public and more are added to the network every week.
This data is to be used for informational purposes only.

What’s New

Version 1.01

Changed wording to make the app more intuitive to use.
Fixed issue with watchlist sorting.
Only parent sensors can be added to the list. The parent sensor represents the entire monitor.
Cleaned up some interface issues.

Ratings and Reviews

3.5 out of 5
4 Ratings

4 Ratings

knvfrsxc ,

No guide whatsoever!

How do I delete an accidentally added monitor? Remains a mystery

What is the difference between a + and a checkmark? Seem to be used interchangeably. Remains a mystery

No ability to search by city like on purple air.! Very disappointing. Wasn’t informed that I needed to prepare to scroll through every US monitor to find the one a few blocks away.

Developer Response ,

Work is underway right now to clean this up a bit. I've been off on other things like school and haven't had an opportunity to get back to it. Now that I've graduated, I should have more time to work on this. I do have a list of items that I'm going to implement, including simplifying the screens and usage. I also want to add the ability to get monitors by region and location. I'll add documentation to that list. I try to write apps so that they are self-documenting and maybe I missed the mark on this one.

I think that searching on a city is actually a function of the map used on the website. It's easy enough to find a monitor to add. All you need is the name of the monitor and that can be easily gotten from the map by clicking on the monitor. The list is searched by the monitor name, so if a monitor is named well it's easy to find. Of course they aren't all named well and that makes it a bit of a challenge, but going to the monitor on the map will give you the information you need.

A "+" is for adding something and a checkmark is the same as Ok. To delete a monitor, left swipe it on the list and there should be a Delete button.

Thanks for the honest feedback. I do intend to improve upon what's already there. Take care.

todd.h ,

Just what I needed

I want to track specific sensors near my house and this app gives me exactly what I want to see. I’m an app developer so was going to build something just like this but now I don’t have to, thanks!

App Privacy

The developer, Scott Kilbourn, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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