I installed CBeebies on my iPhone and looked at the pi-hole to see what type of DNS requests it was making when the app was opened (I haven't clicked on a single thing in the app)

* graph.facebook.com

* analytics.localytics.com

* api.branch.io (analytics & ads)

* app-measurement.com (analytics, maybe ads too?)

* ssl.google-analytics.com

* settings.crashlytics.com (perhaps benign)

So right off the bat Facebook and Google are both siphoning off data from the use of this app among other 3rd parties. Did you know that?