Reminds me of Jodel (https://jodel.com/), an app originally focused on students.
It lost quite some activity in the last decade though, gaining fewer users than it loses.
Interesting. I've never seen this app before. Ya, still not completely the same concept though. It's using proximity.
I can no longer install Jodel, says my device is not compatible (GrapheneOS on Pixel 9).
Jodel seemed to hurt itself badly with unskippable video ads, at least within the local community I am in that used to have a niche group of users.
Similarly, in the US YikYak was also popular at colleges but killed itself by forcing user accounts instead of full anonymity.