diff --git a/docs/analytics/ios.md b/docs/analytics/ios.md
index 0e3e2ef8..ebbbc50f 100644
--- a/docs/analytics/ios.md
+++ b/docs/analytics/ios.md
@@ -5,6 +5,16 @@ description: Manually integrate Analytics into your iOS application.
 
 # iOS Setup
 
+## Device Identification
+
+If you would like to enable Firebase Analytics to generate automatic audience metrics for iOS (as it does by default in Android), you must link additional iOS libraries, [as documented by the Google Firebase team](https://support.google.com/firebase/answer/6318039). Specifically you need `libAdIdAccess.a` and `AdSupport.framework`.
+
+The way to do this using Cocoapods is to add this to your Podfile (though please use [the most current Pod version](https://cocoapods.org/pods/GoogleIDFASupport) supported by react-native-firebase):
+
+```ruby
+  pod 'GoogleIDFASupport', '~> 3.14.0'
+```
+
 > The following steps are only required if your environment does not have access to React Native
 auto-linking.