Continuous notifications on iOS similar to "Allow Insistent Notifications" on Android

User Problem

As a user, I would like sound notifications to continually ring until an alert is seen.
Android phones have this option but iPhones do not.  iPhone will only rings twice and stop. Having alert notifications continue to ring will allow users to hear the alert when sleeping. 

It should be noted that 'insistent notifications' is a feature of the Android OS itself and iOS doesn't have its own option for this yet.

Suggested Solutions

Possibly add an option in user settings or Opsgenie mobile settings to turn on or off continuous notifications until the alert is seen. This would be different from the 'repeat' option in notification rules.

Current Workarounds

For now, users can use 'repeat' in the user notification rules, but this maxes out at 10 times with 1 minute being the shortest repeat time.