I’m wondering would it be feasible to extend the Notification capabilities to add critical to the APNS payload? That would allow you to create critically important notifications that can still alert you when your phone is on silent or do-not-disturb.
I know that this requires permission from Apple, as described in this Medium post, so… 
But I’ve yet to see any app in the App Store that lets you easily implement your own critical alerts. I’m not sure that they’d accept it or not but it would be so awesome!
