Smog Report vs SG Air

Check your air quality at a glance - anywhere in the world. Smog Report shows real-time AQI data from the EPA AirNow and OpenAQ networks with a design that reflects current conditions — colors, gradients, and atmospheric effects shift based on air quality levels and time of day. FEATURES • Real-time AQI for your location with automatic refresh • On-device AI summaries — plain-English daily assessment plus tailored tips • Forecast outlook commentary when upcoming days warrant attention • Live Activity alerts when air quality changes category • 5-day pollutant forecast with smart expansion for multi-pollutant days • 12-month historical trend chart • Siri shortcuts and saved-location entities • Control Center tile and Action Button shortcut • Apple Watch app with standalone support • Home Screen, Lock Screen, and Control Center widgets • Three panel styles: Glass, Frosted, and Material • Full Light and Dark Mode support • Comprehensive VoiceOver and Dynamic Type accessibility 22 LANGUAGES Available in English (US/UK/Australia), Arabic, Danish, Dutch, Finnish, French (France/Canada), German, Hindi, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Spanish (Spain/Latin America/US), Swedish, and Chinese (Simplified/Traditional). PRIVACY All AI inference runs on-device using Apple Intelligence. No air quality summaries, queries, or personal data are sent to any server beyond the air-quality API request itself. DATA Air quality data is provided by the U.S. EPA AirNow, Singapore NEA, or OpenAQ (a nonprofit aggregator of reference monitors). Air quality values, forecasts, and health messages come directly from official monitoring stations near your location.

Singapore Air quality report with 1-hr PSI/AQI, 24hr PSI/AQI, 1hr PM2.5(fine particulate matter), 24Hr PM2.5, 24Hr particulate matter (PM10), sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), and carbon monoxide (CO). Features: - 1hr PSI/AQI Widget - NOTIFICATION service hourly on hazy day base on 1hr PM2.5 PSI/AQI > 100, 24hr PSI/AQI>100 or Sumatra Hotspot count>100 - supported PSI and AQI - Haze map with wind direction, hotspots location and haze coverage (Map update on evening everyday) - Line charts with 24hrs data including 24hr PSI/AQI, Sumatra Hotspot Count, 1hr PM2.5, 24Hr PM2.5, 24Hr PM10, 24Hr SO2, 1Hr NO2, 8Hr O3 and 8Hr CO. - Crowdsource air quality report - check out nearby air quality reported by app users. - Crowdsource photo - photo uploaded by app users. - SG Air Camera Notes: - 1hr PM2.5 PSI: We convert it by following formula from NEA and breakpoints of 24-hr PM2.5(ug/m3). - AQI breakpoints referred from The United States Environmental Protection Agency (EPA) - if you encounter error on Apple Watch, please reinstall apple watch app at Watch > SG Air.