A. PurpleAir does not have an app, but there are a handful of ways to display PurpleAir data:
PWA:
In addition to a web browser, you may access the PurpleAir map from our progressive web app (PWA). This can be installed from Google Chrome. On your computer, at the top right of the address bar, click Install 
. On your Android or iOS device, click or tap Install. This is not installing an app but rather saving a website link to the home screen without the browser clutter that you normally see when viewing a page. Google offers a support page to use progressive web apps.
Google:
Google has added PurpleAir to their air quality layer on Google Maps for Android and IOS. Tap on the button in the top right corner of your screen then select Air Quality under Map details. You can also view air quality from PurpleAir on the Nest Displays and speakers.
Other 3 party apps:
AirPollution, AirNow, Air Matters, Local Haze, AirCare, Air Pollution , AirVisual, AQCheck, Airwyn (check out our blog on how to set up alerts), popAir, Weatherline, Windy and more under development. You would need to set up an account with AQCheck to view your data on the app. To view your sensor on AirVisual’s app, you’d need to send them a request to add a sensor to their map.
Bookmark:
If there are certain sensors you monitor regularly, such as those in your neighborhood or areas in which you exercise, another option is to create a bookmark in your web browser that pulls up that particular map view automatically. Adding that same view to the home screen of your phone or tablet creates an app-type icon; this provides another way to stay informed of sensor readings in spaces that impact or interest you. (Click here for a quick how-to.)
Weather Underground:
WU also gives you the option to share your sensor data with them. The data is sent to their air quality reporting and forecasting system, which is separate from their PWS (Personal Weather Station) system. They do have a PM2.5 and PM10 layer on this map, although I’m unsure as to whether that is visible on their mobile app.
That said, we know how beneficial an app would be and we hope to incorporate this feature in the future.