title: Can I download and install apps that previously published for wp8.1 with a Windows 10 phone?
body: <p>I have read many articles about the "forward compatibility" of WP apps stating an app targeting 8.0 can run on an 8.1 phone. But I have not verified this on WP Store.</p>
  
  <p>I have published a universal app for WP 8.1 and some users have installed this app. Now I am investigating the various upgrading scenarios happen when Windows 10 Mobile comes out later this year.</p>
  
  <p><strong>Scenario 1</strong>: Can a user download and install the 8.1 app with a newly purchased Windows 10 phone? Will it show up in the <em>new, unified</em> Windows Store?</p>
  
  <p><strong>Scenario 2</strong>: Can a user who has already installed this app continue to receive updates to this app after he upgrade his phone to Windows 10 Mobile? I have no plan for a Win 10 release at this stage and I will update the 8.1 release in the months to come.</p>
  
  <p>It will be helpful if you can provide me some links about the policies of the <em>new, unified</em> Windows Store.</p>