title: Retina and non-retina ios App
body: <p>I've got a problem with the Retina-displays. I've got a app which works fine on non-retina displays. </p>
  
  <p>In my css for a list I've set the height of a <code>listitem</code> to <code>20px</code>. </p>
  
  <p>Now when I try the app on a <strong>retina-display</strong> all the items appear <strong>twice the size</strong>. I guess because the iPhone 4 resolution (with <code>window.innerHeight</code> for example) is still <code>480x320</code> even if the real resolution should be <code>960x640</code>.</p>
  
  <p>Now <strong>my question is</strong>, do I need a seperate css for the retina displays or can I scale everything?</p>