Use the Custom Vibrations menu on the Ditto app to turn notifications on and off and to customize the vibrations for various types of events.
You can control vibrations for Phone Calls, Texts, Emails, the Tether and Calendar. This allows you to turn the Tether on and off and Calendar notifications on and off. The default settings on the app are to allow all notifications except Calendar.
Please note that the longer and more numerous the vibrations, the greater the drain on the battery power.