The Blink app provides notifications to tell you what is happening with your Blink account or Blink devices and systems. Notifications from smartwatches or other devices are controlled by their own settings.
Change your Notification Options on the Settings screen when you tap the "gear" icon in the footer of the Blink app.
Then tap the "Notification Options" section to access all of the settings.
Choose which events you want to receive notifications for, then tap the back arrow " < " to return to the Settings screen. The settings save automatically.