As a app designer, the worst thing is having my app unstalled. Second-worst is having my notifications blocked. If many users are blocking our app's notifications, I want to know early and often.
Seems like apps can know if they're blocked (NotificationListener?), but it's not clear how to measure percentage of users blocking my app. I was surprised to find no existing API in Google Analytics or Android's APIs for this.
When I can't find an API for something I presume is really important, it makes me worry there's some other way to get that info that I don't know about. Is there?