Live air quality, updated every few minutes

Know the air
before you breathe it.

Aircaster turns the air around you into a number you can act on — real-time AQI, pollen, and wildfire-smoke alerts for every place you care about, on your phone.

Get the app See how it works
40+Cities covered
3 minRefresh interval
7 daysHistory & trends
Sourced from public monitoring stations No ads · no data resale 40+ metro areas & growing Built for Android

Everything in one breath

The whole picture of your air — pollutants, pollen, and what's blowing in next.

Aircaster pulls together the signals that actually change your day and turns them into clear, color-coded readings you can trust at a glance.

01

Real-time AQI by location

Your exact spot, scored on the US AQI scale and refreshed every few minutes from the nearest monitoring stations — never a stale daily average.

PM2.5 · PM10 · O₃ · NO₂
02

Pollen & allergy forecast

Tree, grass, and ragweed counts for the days ahead, with a plain-language risk level so you know when to grab the antihistamines before you leave.

3-day outlook
03

Severe-weather & smoke alerts

Wildfire smoke, heat advisories, and storms reach you the moment they're issued — pushed straight to your lock screen, not buried in a feed.

Live advisories
04

Track every place at once

Home, the office, your kid's school, grandma across the country — pin as many locations as you like and see them all on one calm, scrollable board.

Unlimited pins
05

Push notifications that matter

Set your own thresholds — alert me when AQI tops 100 or pollen turns high — and Aircaster stays quiet until something genuinely needs your attention.

Custom thresholds
06

7-day history & trends

See whether today is better or worse than your week, spot the patterns behind your symptoms, and plan runs and errands around the cleaner hours.

Hourly & daily charts

One scale, instantly legible

From green to red, you'll always know where today lands.

Aircaster uses the standard US AQI bands and the same color language across every reading, alert, and chart — so a glance is all it takes.

0–50 Good
51–100 Moderate
101–150 Sensitive groups
151+ Unhealthy

How it works

Three taps to cleaner-air decisions.

No setup spreadsheet, no premium paywall to read a number. Install, pin a place, and Aircaster does the watching for you.

  1. 01

    Install & sign in

    Download the Android app, create a free account, and your places and alert preferences follow you to any device you sign in on.

  2. 02

    Pin your places

    Add the spots that matter and choose the thresholds that should wake you — AQI, pollen, smoke, heat. Tune them once, change them anytime.

  3. 03

    Breathe on your terms

    Aircaster watches the air around the clock and pushes you only when something changes — so you act early, not after the headache starts.

Readings come from public, government-grade monitoring networks — no guesswork, no mystery sensors.

Get the app

Get Aircaster

Put the air in your pocket.

Aircaster ships as a direct Android download — install the APK, sign in, and you're tracking your first location in under a minute. Free to start.

Direct download Aircaster for Android How it works

Android 9.0 and up · ~12 MB · no account required to browse your home city

Scan to install