PurpleAir Companion is a lifestyle app developed by EdDroid Apps that allows users to monitor multiple PurpleAir sensors, both public and private. With this app, you can quickly access the latest updates on the air quality in your area.

One of the most significant advantages of PurpleAir Companion is that it offers rapid updates, so you can stay informed about the changing air quality throughout the day. You can also select which sensors you want to monitor on a Google Map, and you only need Sensor ID for private sensors.

The app does not require any special permissions, and location permission is optional. You can see the PM2.5 statistics provided by each sensor as raw measures mapped to AQI, as well as additional data from each sensor such as uptime, temperature, and humidity. Furthermore, AQI definitions are available with just one tap to help you decide if current conditions are healthy or dangerous.

Overall, PurpleAir Companion is an excellent app for anyone looking to stay informed about air quality. With more features in progress, it's definitely worth a download.