Alerter is simply to make a continuous ringing alert from Arduino, ESP 8266,ESP 32 or from where ever the the URL is dialed.

Problem definition: I once tried to develop a burglar phone call project. I had the code for the ESP part but I could not found proper solution to make a phone call or phone ring upon the event.
Then I made this app to address such specific problem where in we require to make a phone call to alert on some event.
In this app you can generate a link and when the link is dialed or loaded a continuous ring alert will be sent to the group of users who subscribed to that alert.
You can even pass the variable values and specific texts along with the alert.
Also notice that it can trigger alert to a group of users at a time.