The Federal Trade Commission has issued warnings to 12 Android app developers that use audio beacons to track consumers across their devices and monitor TV viewing habits. The smartphone apps contain Silverpush software that constantly listens for inaudible signals emitted by TV commercials and secretly collects and transmits viewing data. The announcement appears to be a response to two earlier complaints filed by EPIC with the Commission. EPIC previously urged the FTC to limit "cross-device tracking" technology that links consumers' smartphone activity with what they see on their laptop or television. EPIC also urged the FTC and the Department of Justice to investigate "always-on" consumer devices for possible violations of the Wiretap Act, state privacy laws, or the FTC Act.