OK, slow down there, pardner.

First off, advertising data is already used to do this. The WH app probably doesn't really provide anything new that the CCP can't already buy, the same way the USG buys ad data to track both Americans and non-Americans alike in violation of spirit of the 4th Amendment. The app might be vulnerable to targeted attacks and zero days, as everything made by this administration is twice as expensive and a quarter as good as what's available to the general public because corruption is the only metric for success with them.

Second, if it's a classified device, then (using the DOD as a proxy) the WH app isn't secure enough to be allowed as installed because it wouldn't pass NSA vetting because it is an attack surface for targeted hacks. Meaning that nothing beyond emails that are FOIAable anyway are on the devices.

Third, real life isn't movies. Calm down, Liam Neeson.