title: iOS app rejected due to cookies without asking permission
body: <p>My app was recently rejected for App Store release with the following reason:</p>
  <blockquote>
  <p>We noticed your app accesses web content you own where you collect cookies. Cookies may be used to track users, but you do not use App Tracking Transparency to request the user's permission before collecting data used to track.</p>
  </blockquote>
  <p>The last part is correct: I do not apply App Tracking Transparency.</p>
  <p>The first part is surprising:</p>
  <ul>
  <li>I do not explicitly access cookies by HTTPCookieStorage</li>
  <li>I show a terms-of-use webpage which is included in the app. It does not access any cookies. It has links to external sites that do, but I only navigate to these by switching to safari (using UIApplication.shared.open(...))</li>
  </ul>
  <p>So: How do I figure out how/when cookies are accessed by my app, which makes apple require App Tracking Transparency?</p>