Spain air quality map

The Spanish environmental ministry is

Ministerio para la Transición Ecológica y el Reto Demográfico
https://www.miteco.gob.es/

The air quality measurement is the Índice de Calidad del Aire (ICA).

Air Quality Map

The map is available at

https://ica.miteco.es/

As far as I can tell, they don't have an app, but the website works fine on mobile.

Of note, in addition to PM2.5 pollution from wildfires, Spain also gets PM10 pollution from sand dust blown in from the Sahara.