Hazel - 1-hour PM2.5 PSI Readings for Singapore app for iPhone and iPad

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.

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