I've already integrated my iOS app with google analytics SDK to track everything happening on the app and to get the useful reports that it generates. I've enabled the Demographics reports which let me see the ages/gender that are using the app but my question is how google can know the age and the gender of the user on an apple device. I'm assuming that on android they can know everything since the user has to enter his gmail account to manage his phone so they are able to get this information from his account but what about apple devices?How can they know this information?
I've checked this:Setting user Gender & Age in Google Analytics iOS SDK v3 but no one has replied on it.
EDITED: I've enabled the demographics and Interest Reports and I'm not seeing anything related to the age and gender under the reporting section!!