FWIW, Apple has frowned upon the browser cookie check approach and they might reject a submission using it: http://techcrunch.com/2013/02/25/apple-rejecting-app

FWIW, Apple has frowned upon the browser cookie check approach and they might reject a submission using it: http://techcrunch.com/2013/02/25/apple-rejecting-apps-using-cookie-tracking-methods-signaling-push-to-its-own-ad-identifier-technology-is-now-underway/ http://techcrunch.com/2013/02/25/apple-rejecting-apps-using-... Do you guys have any estimates as to what the rate of error might be for the fingerprint approach? Excited to see where you guys are going with this product!