title: How can I detect whether a user has an iPhone 6 Plus in standard or zoomed mode?
body: <p>How can I detect whether a user has an iPhone 6 Plus in standard or zoomed mode?
  Is this possible?</p>
  
  <p>I've tried <code>[UIScreen mainScreen].scale</code> and it reports <code>3.0</code> in both cases.</p>