In iOS7 you can granularly allow/disallow apps access to: location services, contacts, calendars, reminders, photos, bluetooth sharing, microphone, motion activ

In iOS7 you can granularly allow/disallow apps access to: location services, contacts, calendars, reminders, photos, bluetooth sharing, microphone, motion activity (iPhone 5S and new iPads only) The first time an app tries to access any of the above you will be asked whether to grant it permission or not. You can then edit this preferences in Settings.app > Privacy