HazeWatch SG
Live PSI and PM2.5 readings
Free · Designed for iPad. Not verified for macOS.
Check Singapore's air quality in a second.
HazeWatch SG shows the latest readings from the National Environment Agency, published hourly on data.gov.sg:
• 24-hr PSI for the North, South, East, West and Central regions, with the health band for each
• 1-hr PM2.5 for every region, useful for deciding about a run or a walk right now
• What today's reading means for you, in the official NEA/MOH activity advice
• Home Screen and Lock Screen widgets, so you can check the haze without opening the app
• A chart of the last 24 hours so you can see whether the haze is getting better or worse
• The activity guide for healthy people, the elderly, pregnant women and children, and people with heart or lung conditions
• Quick links to haze.gov.sg, NEA, HealthHub, MOE and MOM for official advisories
Every reading shows the hour it is for, and the app tells you clearly when readings are out of date or can't be updated. The latest readings stay on your phone so you can still see them offline.
No account, no ads, no tracking.
HazeWatch SG is an independent app and is not affiliated with NEA or the Singapore Government. Contains information from data.gov.sg made available under the Singapore Open Data Licence version 1.0.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• New widgets for your Home Screen and Lock Screen: the 24-hr PSI for your region (or the highest), its band and the hour it's for, at a glance. Old readings are clearly marked.
• All five regions' readings together at the top of the Now screen.
• "What this means today": the official NEA/MOH activity advice for the current PSI, right on the Now screen, plus where the 1-hr PM2.5 stands right now.
• Set your region to see it first and base the advice on it. No location access needed.
• The 24 Hours chart now answers "better or worse?" in one line, with shaded health bands and a scale that fits the readings.
• The Health guide opens on today's band and explains what "reduce", "minimise" and "avoid" mean.
• Readings refresh by themselves each hour while the app is open, and the 24-hour chart works offline.
• Easier-to-read colours in light mode.
The developer, dafeng ji, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- dafeng ji
- Size
- 1.2 MB
- Category
- Weather
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 Dafeng Ji