[gascan]

Dang, would be nice if Android had more AQI built in. The 3rd party apps are not exactly rock solid.

[ptx]

My Huawei phone shows AQI in the weather app (don't know if it's Google's or Huawei's app) but only for some cities – it shows up for Beijing and Shanghai but not Paris or Athens.

[seanmcdirmid]

AQI is essential to know in China, so the market adapts.

[palcu]

I found the Plume app to have good information and a nice UI.