Air Quality Index AQI
Pollution, PM2.5 & Smog Map
Only for iPhone
Free
iPhone
Live air quality with a breathing AQI orb, the dominant pollutant, and clear advice on masks, ventilation and whether it's safe to go out.
Breathe with confidence. Air Quality Index AQI gives you a live, color-coded read on the air around you — a single AQI number you can act on, the pollutant driving it, and straightforward advice on whether to open the windows, wear a mask, or keep the kids inside today.
The home screen centers on a gently breathing AQI orb that shifts color with the air quality, from green "good" to deep "hazardous," with a one-line summary and health advice underneath.
WHAT YOU GET
• Live AQI with health advice — a big, clear index with its category and plain-language guidance on outdoor activity, switchable between US AQI and EU AQI.
• Dominant pollutant — instantly see which pollutant is the worst offender right now and how many are above the WHO guideline.
• Full pollutant breakdown — current PM2.5, PM10, ozone (O3), nitrogen dioxide (NO2), sulphur dioxide (SO2) and carbon monoxide (CO), each shown against the WHO 2021 guideline limit so you know what's elevated.
• Sensitive-group warnings — tailored notes for children, older adults and people with asthma, heart or lung conditions.
• Mask & ventilation advice — should you mask up outdoors, and is it a good time to air out the house or keep windows shut?
• 24-hour & 5-day trend — see whether the air is improving or worsening, with min/avg/max and a five-day outlook.
WHO IT'S FOR
People with asthma or other respiratory conditions, parents, runners and cyclists, anyone living near traffic or industry, those in wildfire-smoke regions, and anyone who simply wants to know if today's air is clean.
HOW IT WORKS
Air-quality data comes from the Open-Meteo air-quality model for your location. Enable location for live local readings, or browse sample data offline.
A NOTE ON ACCURACY
AQI and pollutant values are modeled forecasts and estimates, not a measurement at your exact spot, and vary with weather and local sources. Comparisons use WHO 2021 guideline levels for reference only. This is not medical advice.
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Thanks for using our app! This update brings behind-the-scenes performance and stability improvements for a smoother, more reliable experience. Your support means the world to us.
The developer, heekyung moon, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- heekyung moon
- Size
- 54.8 MB
- Category
- Weather
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Contains
Advertising
- Copyright
- © 2026 Moon