Ntfy.sh – Send push notifications to your phone via PUT/POST (ntfy.sh)

I do use gotify [1] which seems to be pretty much the same, and does the job quite well. Not sure how they compare, does ntfy goes through Google / Apple network or it's directly connected to your server instance?

[1] https://gotify.net/

ntfy can be self hosted, but I still support the official service. Use it daily.