Only the current version so far — new entries appear as the app ships updates.
PM2.5 Monitor is a weather app by Avicore ROP with 100+ downloads (about 210 estimated). +2 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “An app that monitors real-time PM2.5 levels and provides health advice based on air quality levels.”
