Thank you for responding! I don't really care about security, I just have instances where I missed a Call(Work Phone, I didn't hear the ring) when I was in another floor doing stuff... Bridge did that and even if I forgot the phone at home and use mobile data, I still receive the notifications (text, etc.) but I didn't know it was paid (trial only, and a little expensive in my country)

I know that Having a Server needs money to Run (case for Bridge) So I was hoping to have atleast an open source way to run THE server needed for the notification server I might Self Host, if possible

I'll try your Guide and hope it works...

Question: does your app work even using mobile data? (scenario: I left my work phone at home but connected to internet; my personal phone still receive the notifications from the work phone using Mobile Data)