The article, and Apple's messaging therein, contradicts your understanding of this feature.
> Because Critical Alerts are disruptive, they are meant to be used for a very restricted number of purposes. This include medical- and health-related notifications, home- and security-related notifications, and public safety notifications.
Only the last use case matches what you describe. And as the article says, Apple's own Health app uses this feature, along with, apparently, simple TODO apps. Apple's health app makes sense, since Apple specifically calls out medical apps. Is a medicine reminder app a medical app? I would say so.
Apple's developer documentation states:
> Critical alerts ignore the mute switch and Do Not Disturb; the system plays a critical alert’s sound regardless of the device’s mute or Do Not Disturb settings. You can specify a custom sound and volume.
>
> Critical alerts require a special entitlement issued by Apple.
> Because Critical Alerts are disruptive, they are meant to be used for a very restricted number of purposes. This include medical- and health-related notifications, home- and security-related notifications, and public safety notifications.
Only the last use case matches what you describe. And as the article says, Apple's own Health app uses this feature, along with, apparently, simple TODO apps. Apple's health app makes sense, since Apple specifically calls out medical apps. Is a medicine reminder app a medical app? I would say so.
Apple's developer documentation states:
> Critical alerts ignore the mute switch and Do Not Disturb; the system plays a critical alert’s sound regardless of the device’s mute or Do Not Disturb settings. You can specify a custom sound and volume. > > Critical alerts require a special entitlement issued by Apple.