Firebase does not collect age and gender data

Question

I am linking my Android and iOS app to Firebase Analytics, and it seems to work well except I cannot collect the "automatic" information about the user, such as gender and age.

I can see some thousands of users, and I can also track custom events (like in-app purchases)

But in the same view, gender and age are not present.

This question looks like the same, but the answer is not applicable: I used DebugView to test it and then deactivated it as per documentation.

of course, View "All Users" audience displays the same data.

Answer 1

There are possible reasons:

1. Google Signals isn't activated. Make sure that you have enabled Google Signals for your property, because Google signals are session data that Google associates with users who have logged in to their Google accounts and who have turned on Ads Personalization.
2. Collection of Device Advertising IDs is disabled. Please ensure that the Collection of Device Advertising IDs is enabled, so that you will be able to see demographic and interest data on the Analytics dashboard since this is used to track user properties such as Age, Gender and Interests. Also, Analytics derives demographics and interests data from the Android Advertising ID or the iOS Identifier for Advertisers (IDFA).
3. google-services.json or dependencies are outdated

I have such problem. 1 and 3 solve it. You also can contact Firebase Support.