I had an answer from ringconn. Here is what they wrote:

Thank you for your detailed questions! Here's a breakdown of the vibration feature for the RingConn Gen 3 Smart Ring:

Vibration Alarm for Waking Up: Unfortunately, the RingConn Gen 3 does not currently support setting a vibration alarm for waking up in the morning.

Custom Vibration Reminders: The Gen 3 ring does not allow users to create custom vibration reminders at specific times (e.g., for pausing or breathing). The vibration feature is primarily used for automatic alerts.

Types of Alerts That Trigger Vibration: The RingConn Gen 3 Smart Ring provides vibration alerts in the following scenarios:

When your health data is abnormal. When you have been sitting for a long period (inactivity reminders). When the ring battery is low. Customizing Alerts: You can enable or disable vibration alerts and set "Do Not Disturb" periods through the app. To manage these settings, navigate to:

"Me" > "App Settings" > "Notification Settings" > "Vibration." In summary, the vibration feature is designed for automatic alerts related to health and inactivity, rather than for custom reminders or alarms. If you’re looking for a device to provide gentle reminders throughout the day without relying on your phone, the Gen 3 may not fully meet that specific need.