What's New

This app has been updated by Apple to display the Apple Watch app icon.

App Description

Hazel tells you how bad the haze is right now, right where you are.

Make better decisions about whether you need a mask, or if you should be bringing your baby out.



Hazel calculates the 1-hour PSI using a formula provided by NEA. It converts the concentration of PM2.5 pollutant into a scale from 0–500.

Hourly push notifications keeps you up to date about the latest 1-hour PSI readings the moment NEA releases the data.

iPhone Screenshots

(click to enlarge)

Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 1 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 2 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 3 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 4 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 5

iPad Screenshots

(click to enlarge)

Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 6 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 7 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 8 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 9 Hazel - 1-hour PM2.5 PSI Readings for Singapore screenshot 10

App Changes

  • October 25, 2015 Initial release

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