title: How to automatically update a Flutter Mobile app to newer version when the application is not on play store or app store?
body: <p>let's say i have a Flutter APK hosted on my website where users can download and install , what i'm interested to know  is how possible that the application can check for newer version when the app lunches and if true a progress bar appears showing the automatic updating of the application from the server (not play store or app store) ? .<br>
  here is a <a href="https://coinpoker.com/" rel="nofollow noreferrer">company</a> that do exactly the mentioned above meaning :</p>
  <ul>
  <li>download the apk from there server</li>
  <li>whenever a new version is released the app will update from their server</li>
  </ul>
  <p>any ideas how to achieve this ?</p>