title: Block direct url access from browsers, but allow from ios and android
body: <p>I am making an app that uploads and downloads images. I save these images on the server (Bluehost). However, I do not want the images to be accessible directly on the browser, only through the app. </p>
  
  <p>I tried to block them in .htaccess file, it worked but it blocked all kinds of access including through app.</p>
  
  <p>Is there a way to get around this? There are quite a few questions about this issue here, but none of them really helps.</p>
  
  <p>Thanks</p>