Airly is extremely blocking access to their data. They boast with "open data" but their API is extremely restrictive (ToS) as well limited (ex. how much data you can get and how often), terms of service are very complicated and change often without notice.

Airly is exactly a case how we should NOT monitor air quality as this company sells cheap stations to (mostly) government with then high monthly fees and with closed access to data obtained from those stations, while at the same time saying words such as "open data".

Source: I'm author of Kanarek mobile app, and had a "pleasure" to work with them. https://spidersweb.pl/2018/01/kanarek-airly-smog-w-polsce.ht...