If you do not like to see you data is exposed or adherent of any conspiracy theory, prepare yourself for this news: Apple is tracking everything you do on iOS 6. Calm, the company is not interested in distributing your data around or do something. The idea is to offer contextual ads and more relevant interest based ads. The news was raised last week by the website Business Insider. According to the publication, iOS 6 brings a technology called "identifier for advertisers" (IFA), a sort of anonymous number that identifies everything that you do with the device, transforming this information into database to draw a profile and recognize what are your habits.
However, you can get rid of this tracking. To do this, go to "Settings" and select the "General" tabs and then "About". There you will find a tab called "Advertising." All you need to do is enable the "Limit advertising traced" and done: you're safe.