Google's passive collection of personal data from Android and iOS has been monitored and measured in a significant academic study.
The report confirms that Google is no respecter of the Chrome browser's "incognito mode" aka "porn mode", collecting Chrome data to add to your personal profile, as we pointed out earlier this year.
It's here that the B2B parts of Google's vast data collection network – its publisher and advertiser products – kick into life as soon the user engages with a phone.
These parts of Google receive personal data from an Android even when the phone is static and not being used.
The activity has come to light thanks to research (PDF) by computer science professor Douglas Schmidt of Vanderbilt University, conducted for the nonprofit trade association Digital Content Next.
It's already been described by one privacy activist as "the most comprehensive report on Google's data collection practices so far".