# HazeWatch SG — Live PSI and PM2.5 readings

> Live PSI and PM2.5 readings (iPhone/iPad app by dafeng ji.)

- Source: https://appshunter.io/ios/app/hazewatch-sg/id6824961140 (this page in markdown: same URL + `.md`)
- Developer: [dafeng ji](https://appshunter.io/developer/6824915508)
- Category: Weather, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 1 MB
- Languages: American English
- Released: 2026-10-23
- Data updated: 2026-10-26

## What is HazeWatch SG?

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Every reading shows the hour it is for, and the app tells you clearly when readings are out of date or can't be updated.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.

## Is HazeWatch SG safe?

Not enough ratings yet to assess HazeWatch SG.

## Is HazeWatch SG legit?

HazeWatch SG has limited verification signals. The AppsHunter Legitimacy Score for HazeWatch SG is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1 — 2026-10-25

• 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.

### 1.0 — 2026-10-23

No release notes.

## More apps by dafeng ji

- [Pulse Dash: Neon Beat Run](https://appshunter.io/ios/app/pulse-dash-neon-beat-run/id6824915506)

All apps by dafeng ji: https://appshunter.io/developer/6824915508

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-26.*