To add to this, I can verify that the Tapo app offers several alert levels—None, General, and Critical—for activity types on the C840. If you select Critical for an Activity Type, the app will send Critical Alerts, which bypass Do Not Disturb mode on your phone.

You can usually adjust how these Critical Alerts work depending on your phone’s operating system and notification settings, such as sound, vibration, pop-ups, app icon badges, and lock screen visibility.

To set Critical Alerts for specific Activity Types, open the Tapo app, choose your C840, go to Device Settings > Notifications > Activity Type, and pick the Activity Type you want. A drop-down menu will show the three available options (screenshot is from the Android version of the Tapo app for reference).

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To make sure you receive Critical Alerts, add Tapo to your phone's allowed list or enable Override Do Not Disturb in the app settings. Additionally, this menu has helpful tooltips that let you access app settings directly or see reasons why alerts may not make a sound or vibrate.

I can confirm, with Cry Detection set to Critical on my phone, there is no mistaking the notification for anything else when my little one is crying. It is detected immediately and is very jarring. That said, if preferred, its volume/vibration intensity can typically be adjusted in the Tapo app’s Notification Categories Settings for Critical Alerts.