The Google Play store tells the browser what framing policy to use with X-Frame-Options (https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Option...):

  x-frame-options:SAMEORIGIN

However you could also check for:

  window.top == window

    if (window.top !== window) {
        window.top.location = window.location
    }

It's useful if your website is being iframed to display ads or exploited with cross window communication security holes (old school)

http://i.imgur.com/ePFbiIT.png