Notifications and phone app
Email and push notifications, and Orlok installed on your phone.
When something in one of your conversations waits for your approval, you get an email and, if enabled, a push notification. When a late intervention you asked for ends, you are told as well. Notifications go only to you, the person the intervention was asked for. Choose what to receive at Account.
Install the app on your phone
Over HTTPS, open Orlok in the phone's browser and add it to the home screen: it opens like an app and can receive push notifications.