Apple collects data on your Siri usage. Information sent to Apple includes your contacts in the address book, your name and contact information, songs and playlists from your media library, audio recordings of you speaking, transcripts of what you have said, and operating system information/performance statistics. If you use Siri, a lot of your personal information goes to Apple.
What’s more, this information may be shared with Apple’s partners for dictation-related services, but it is not shared with other third parties. You cannot opt out of data collection, but you can opt out of Siri entirely by not using the feature and disabling it in Settings or System Preferences.
If you don’t mind having Apple collect information on you, but you want to opt out your children, you can separately control access to Dictation in the Parental Controls pane.
For more about Siri privacy issues, tap the About Siri and Privacy link in the iOS Siri Settings pane or the About Dictation and Privacy link in the OS X Dictation & Speech pane. Figure 1-7 shows the privacy disclosure screens for iOS and OS X.
Figure 1-7. Apple collects a lot of information when you use Siri.