Official site: https://www.iceblock.app/
The CNN article talks a bit more about privacy issues. This bit caught my eye:
It’s only available on iOS because Aaron says the app would have to collect information that could ultimately put users at risk to provide the same experience on Android.
I would like to see some details about this. Perhaps there’s a way to work around that problem, even if it meant publishing on F-Droid instead of Google Play.
Not an expert but ephemeral IDs would not give you much.
AFIK under the hoods android notifications is just… a chat app (Ehehe classic google). So for sending a notification you need to send it to the ID of your mobile. Even if you manage to convince Android to register with an additional ephemeral ID Google would be able to map the ephemeral to the real since… well… it is running on the mobile
Note this part of what I wrote:
Google’s default one is not the only one.