I am using Homey and the app Heimdall as a complete security system. So far, it is working perfectly. What I am missing, is some way of playing an ongoing alarm on my iPhone that has to be dismissed before it stops. It should also override if I have silenced my phone during the night. Any ideas?
In short: not possible with a (non-jailbroken) iPhone.
This can be a solution:
Then I can tag the Woopla phone number as favorite that will call me even though the phone is silenced.
I am not very familiar with IFTTT. How do I configure a phone call when my flow “Alarm tripped” is running?
Here is everything you need to know about iPhone alarm. You will learn how to set alarm on iPhone 13, how to set ringtone and other.