# SG Air Quality — PM2.5 and PSI

> PM2.5 and PSI (iPhone/iPad app by Stuart Breckenridge.)

- Source: https://appshunter.io/ios/app/sg-air-quality/id6759510601 (this page in markdown: same URL + `.md`)
- Developer: [Stuart Breckenridge](https://appshunter.io/developer/1440701630)
- Category: Health & Fitness, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 26.2 · 8 MB
- Languages: American English
- Released: 2026-09-17
- Data updated: 2026-09-24
- User reviews in markdown: https://appshunter.io/ios/app/sg-air-quality/id6759510601/reviews.md

## What is SG Air Quality?

# All five regions, one glance
Singapore's North, South, East, West and Central region, each with its current 1-hour PM2.5 and 24-hour PSI reading, colour-coded so you don't have to remember what the numbers mean. Refreshed readings are available one an hour and will update in the background.

# A plain-English summary
Using Apple Intelligence, the app writes a short summary of what today's readings actually mean for your outdoor plans.

# Alerts, on your terms
Pick your own PM2.5 and PSI thresholds, choose the regions you care about, and the app will let you know when the air crosses the line.

# See where it's heading
Interactive charts for the last 12 hours, 24 hours or 3 days, for both PM2.5 and PSI. Scrub across the chart to compare every region at any point in time. Handy for working out whether the haze is clearing or settling in.

PM2.5 and PSI readings are sourced from data.gov.sg.


## Version history (last 2 releases)

### 1.1 — 2026-09-20

Bug fixes in relation to notifications.

### 1.0 — 2026-09-17

No release notes.

## More apps by Stuart Breckenridge

- [Singapore Buses](https://appshunter.io/ios/app/singapore-buses/id1510097546)
- [Capybara Squad Games](https://appshunter.io/ios/app/capybara-squad-games/id6758884723)

All apps by Stuart Breckenridge: https://appshunter.io/developer/1440701630

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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 2026-09-24.*