---
title: UNNotificationInterruptionLevel.critical
framework: usernotifications
role: symbol
role_heading: Case
path: usernotifications/unnotificationinterruptionlevel/critical
---

# UNNotificationInterruptionLevel.critical

The system presents the notification immediately, lights up the screen, and bypasses the mute switch to play a sound.

## Declaration

```swift
case critical
```

## Discussion

Discussion This interruption level requires an approved entitlement. The system always presents this notification, even when Do Not Disturb is active. If your app doesn’t assign a sound to this notification, the system uses the default critical alert sound.

## See Also

### Enumeration Cases

- [UNNotificationInterruptionLevel.active](usernotifications/unnotificationinterruptionlevel/active.md)
- [UNNotificationInterruptionLevel.passive](usernotifications/unnotificationinterruptionlevel/passive.md)
- [UNNotificationInterruptionLevel.timeSensitive](usernotifications/unnotificationinterruptionlevel/timesensitive.md)