Comment by clbrook

It's a bit like Tosslet. https://www.tosslet.com/

Edit: But with Tosslet you don't need to (get to?) have an account to see (catch) messages or provide any other information (e.g. email). We have a privacy-first focus and don't require or allow the use of your actual location (gps).

Disclaimer: I'm the developer of Tosslet