AQI Bar
Air quality in your Mac menu bar.
Visit AQI BarAQI Bar is a small Mac app that shows the air quality index of your city in the menu bar. The number is green when the air is good and goes yellow, orange, red and purple as it gets worse. Above 150 it turns bold.
You'll need a free API key from IQAir. Paste it in, search for your city and that's it. It updates every 15 minutes.