Sensors can be added to the app via the map or by manually entering the ID.
You can regularly share a summary of PM sensor data with your local community using the “Share” feature.
My application has now been accepted into the official F-Droid repository. If you use F-Droid, you can install it directly from there and receive updates automatically.
I have also completed an iOS version of the application. At the moment it isn’t publicly available because distributing iOS apps requires an Apple Developer Program membership. If there is ever interest from the Sensor.Community project in providing an official iOS app, I’d be happy to discuss possible ways to make that happen.