Air Quality Alert: Outdoor
PM2.5 score tuned to family
Free · Designed for iPad. Not verified for macOS.
Is it safe to head outside today? PM2.5, PM10, and ozone become a 0–100 outdoor score tuned to each family member — with a four-step color band you can read at a glance.
Raw PM2.5 numbers rarely answer the question you actually have: "Is it okay to go out right now — with my kid, with my parents, with the dog?" Air Quality Alert turns PM2.5, PM10, and ozone readings into a single 0–100 outdoor score tuned to whoever you're heading out with. One number, one color, decision made.
■ Outdoor score — intuitive, not just a number
We weigh PM2.5 (0.5), PM10 (0.3), and ozone (0.2) against your family's thresholds. At the threshold you'll see 50 (the boundary between "go" and "stay"); double the threshold reads as 0. So "75 today, light walk is fine" becomes a natural call. The score is paired with a four-step color band — Good / Moderate / Bad / Very Bad — so you can read it at a glance, even from a notification.
■ Five family profiles
The same pollutant load affects people differently. The app keeps five profiles, each with its own thresholds:
· Adult — standard reference
· Kid — stricter, more cautious calls
· Pregnant — sensitive-group thresholds
· Elderly — sensitive-group thresholds
· Pet — quick read for walks
Switch profiles with one tap at the top of the home screen.
■ Hourly trend and tomorrow's forecast
PM2.5 and PM10 are plotted hourly so you can see whether the air is getting cleaner or worse. When forecast data is available, the app surfaces tomorrow's best window — "afternoon onward looks best" — so you can plan ahead.
■ Threshold push alerts
Set a PM2.5 threshold; we push when it gets crossed. No need to open the app right before stepping out.
■ Automatic station match
Allow location once, and the app finds the nearest air-quality station for you. Want to check another city? Search and pin any station by name.
■ Data source
Powered by the global station network aggregated by the World Air Quality Index (WAQI) project — the same view works whether you're at home or traveling.
■ Privacy
No sign-up. Profiles, thresholds, and pinned stations live entirely on your device. Location is used only to find the nearest station and is never stored.
Built for the small moment every morning when you crack the window open and wonder whether to grab a mask. Use it on whatever family standard fits today, and step out with one less thing to second-guess.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
v1.0.1 update
• In-app update support — get notified inside the app when a new version is available
• Stability improvements
The developer, SiU Ahn, 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
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SiU Ahn
- Size
- 34.8 MB
- Category
- Weather
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 SiU Ahn