I've made a server on my raspberry and a mobile app to control it. I can connect to it when my mobile is connected to the same net, but I cannot do it outside of the net.
Actually I'm using ngrok to reach it but the session expires in 8 hours.
Is there any way to keep it on all the time I want? (or kind of, like a script that auto execute ngrok if the system detects that is not running)
And without ngrok how could I reach that server?