Storefronts last tested between 2022-06-19 and 2026-04-28. IQAir AirVisual | Air Quality was tested in 134 Apple App Store storefronts — available in 133; unavailable in 1 (China mainland).Roughly 1.4 billion people live in the 1 storefront where it is unavailable. App unavailability does not by itself prove censorship.