SG Air Index (PSI)
Singapore PSI & PM2.5
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
AirIndex is a Singapore air-quality companion. It shows official PSI and PM2.5 by region on a live map, trends over time, and optional alerts when air turns unhealthy — and when it is safe again.
WHY AIRINDEX
Singapore already publishes PSI and PM2.5. Most people need more than a table of numbers. They need where air quality is right now, how bad it is in the bands they already know, how it is moving, and a tap on the shoulder when conditions become unhealthy.
WHAT YOU GET
• Regional map — North, East, Central, South, and West badges on a Singapore outline, with headline PSI or PM2.5 and health status
• PSI and PM2.5 toggle — switch the metric without leaving the screen
• Health bands — Good, Moderate, Unhealthy, Very Unhealthy, Hazardous, aligned with NEA-style PSI ranges (Unhealthy starts at 101)
• Trends — 24-hour, 7-day, and 30-day charts, plus regional high and low
• Unhealthy-air alerts — opt-in push when national PSI crosses into Unhealthy (101+), and a one-time notice when it returns to healthy
• Dark, glanceable UI — built for a quick check outdoors or on the commute
DATA
Readings come from official Singapore open data (data.gov.sg). National PSI is the highest of the five regions for that hour. Times are shown in Singapore time (UTC+8).
WHO IT IS FOR
Residents, commuters, and anyone who spends time outdoors in Singapore — especially people sensitive to haze, smoke, or high particulate days.
AirIndex shows Singapore’s air by region, in the bands people already know, and tells you when it turns unhealthy — and when it is safe again.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's new in this update
• Malaysia air quality: live API readings from official DOE APIMS stations across Peninsular and East Malaysia
• Singapore: PSI and PM2.5 by region, same as before
• Country switcher so you can move between Singapore and Malaysia
Note: Malaysia shows the API index only in this release (no live PM2.5 yet).
The developer, KingRex Solution, 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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- KingRex Solution Pte Ltd
- Size
- 83.1 MB
- Category
- Weather
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Age Rating
4+
- 4+
- Copyright
- © 2026 KingRex Solution Pte Ltd