Good allergy data is impossible
Pollensense, having their own realtime sensor network and an easy to consume app makes this a lot easier. But even here there are some difficulties. It’s not really clear where the stations are. They could be 50 miles away “in your metro area” but that might not be helpful if you are upwind of the station.
They also seemed to have removed information about actual detected allergens from the app - unless it’s a bug - and that makes it pretty useless.
Finally, I’d pay for access to the realtime dataset, but paying a subscription fee for an app used so infrequently is just blah. A website, daily - detailed- email, or api access to integrate into my own dashboards is worth the price.