iOS devices are leaky as hell. I once tried blackholing all requests besides those to a VPN service on a router level, and even then my iPhone would just fall back to mobile data for notifications and other Apple services.
I'm not defending Google in anyway, I'm sure they do, and I'd be the first to deride them too. But HN generally has a lot more forgiveness for apple, for some reason.
Apple does a lot of marketing around protecting user privacy better than the competition. In this case, iOS leaks more data than Android.