[corbett3000]

Anyone have an idea for how to block this on your iphone? Perhaps content filtering glassboxdigital.com? Not sure if that would stop however it is that they're transmitting back to their servers.

[AndrewConn]

Possibly... I might try using Charles Proxy mobile app to observe what domains data is being sent/received from, then on your home network use something like Pi-Hole to block those domains.

[crescentfresh]

Does Charles (iOS) allow capturing traffic of any app launched? Is it like a "record" button for network traffic?

[mcphage]

If you can monitor it via a web proxy, then you should be able to block it the same way.