The following article published by Symantec states that iOS has more vulnerabilities than Android. http://www.symantec.com/content/en/...-istr_main_report_v18_2012_21291018.en-us.pdf Other articles suggest the same as the Symantec article but the statistics don't match and other articles seem to have more accurate numbers at least in relation to iOS. http://www.zdnet.com/iphones-most-vulnerable-among-smartphones-7000013129/ The Symantec article does state that iOS is still more secure than Android because of the wall garden approach of Apple. But, I wonder where Symantec and others got the data for the statistics stating that iOS has more vulnerabilities. A quick search of CVE shows that Android has more vulnerabilities than iOS. Android = 338 (at time of this post) - https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=Android Apple iOS = 260 (at time of this post using two searches: Apple iOS and iPhone OS) - https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=Apple+iOS - https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=iPhone+OS I think the issue with the numbers provided by these articles is that the articles only report numbers attributed to vendors and not the OS platforms as a whole. Many of the vulnerabilities in Android are attributed to third party projects used in Android but not to Android as in use in the wild. This practice makes the statistics not represent the real world numbers of vulnerabilities.