// the field guide

Air, explained.

Longer reads on what's actually in the air around you, drawn from peer-reviewed research and written in plain English. No fear-mongering, no fluff. Every number is cited.

// start with the basics

The science

What is PM2.5?

Fine particles ~30× smaller than a hair: where they come from and what they do to your body.

Read →The science

What does CO₂ do to you?

Why rebreathed air tracks with worse focus and sleep, and what the ppm numbers mean.

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Air Quality and Asthma: What the Research Says About PM2.5 and Your Lungs
6 Jun 20268 min read
A 25-million-participant meta-analysis links PM2.5 to roughly 30% of global asthma cases. What the evidence shows about indoor triggers and HEPA filtration.
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Do Air Quality Monitors Detect Mold? The Honest Answer (and What They Can Do)
6 Jun 20266 min read
Air quality monitors can't detect mold directly, but they track three signals (humidity, PM2.5, and VOCs) that flag mold risk before it becomes a problem.
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Do Houseplants Clean the Air? What the Science Actually Says
6 Jun 20267 min read
The 1989 NASA study launched the 'air-purifying plants' myth. 35 years of follow-up research says otherwise. What plants can and can't do for indoor air.
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Office Air Quality: How to Test, Understand, and Improve the Air at Work
6 Jun 20268 min read
That drowsy 3pm feeling in meeting rooms is often CO₂. How to test your office air quality, what the numbers mean, and what actually fixes it.
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What Air Quality Is Safe for Babies? AQI Levels Every Parent Should Know
6 Jun 20267 min read
Babies breathe faster and have developing lungs, making them more vulnerable to air pollution. What AQI means for infants and which indoor sources to watch.
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Reading about air is step one.

The research is clear: what you breathe matters, and most of it is invisible. Partycle is a portable sensor that turns the PM2.5 and CO₂ around you into numbers you can actually act on.

Get notified →Try the tools →

What is PM2.5?

What does CO₂ do to you?

Air Quality and Asthma: What the Research Says About PM2.5 and Your Lungs

Do Air Quality Monitors Detect Mold? The Honest Answer (and What They Can Do)

Do Houseplants Clean the Air? What the Science Actually Says

Office Air Quality: How to Test, Understand, and Improve the Air at Work

What Air Quality Is Safe for Babies? AQI Levels Every Parent Should Know

Reading about air is step one.