Create an (repetitive high pitch) Alarm on a remote trigger when App is not running (iphone/android) just like Find My iPhone

Question

I would like to cause an alarm on a remote iphone/android device when the app is running or not running.

How do I achieve it ?

I can only think of Whatsapp/S

Answer 1

1 possible solution could be schedule alarm event with repeatInterval on receiving push notification.

EDIT We can create custom notifications using Notification extensions.They are called as soon as notification arrives & we can present customized view with image/video downloading. So you can try there to schedule events.