Advertising's hottest surveillance software is surprisingly legal
SilverPush knows which ads you see on TV, the web, and much, much more.
SilverPush claims its TV monitoring app didn't snoop on you
The company says its controversial tracking app only hears its own watermarks anyway.
FTC issues warning to apps covertly monitoring TV broadcasts
Advertising company Silverpush's back-end tech is allegedly compiling user data gleaned from ultrasonics.