title: Flutter - how to create 30 Minutes or any background timer in flutter?
body: <p><strong>Hello Guys!</strong></p>
  <p><em><strong>for Example:</strong></em>
  I want when the user clicks on the button Start 30 minutes timer and button disable. If the user closes the application but the timer doesn't stop it should work in the background how can I create this system?
  In simple words I want it like candy crush when life is 0 then start background timer of 1hour after 1 hour live is full 5...</p>
  <p>I search at <a href="https://pub.dev" rel="nofollow noreferrer">pub.dev</a> but can't find any plugins or package</p>