title: SharePoint 2013 iFrame vs app
body: <p>What is the difference between 1) an ASP.NET application exposed in SharePoint by an IFrame 
  and
  2) a SharePoint 2013 App exposed through an app part.</p>
  
  <p>Say both use CSOM and resides in intranet on a separate server (SharePoint App is provider hosted on a server in intranet ).</p>