title: How to send notification if user inactive for 3 days
body: <p>I am developing an android app and I want to send "We Miss You" notification to user if he/she is inactive for more than 3 days.
  This means if the user does not open our app for 3 days I want to send them a notification of "We Miss you"
  Like Deer Hunter and Temple Run sends
  Thank you :)</p>