https://www.cnbc.com/2018/08/08/apple-tells-lawmakers-iphones-are-not-listening-in-on-consumers.html

Apple told U.S. lawmakers on Tuesday that its iPhones do not listen to users without their consent and do not allow third-party apps to do so either, after lawmakers asked the company if its devices were invading users' privacy.

Representatives Greg Walden, Marsha Blackburn, Gregg Harper and Robert Latta wrote to Apple's chief executive Tim Cook and Alphabet chief executive Larry Page in July, citing concerns about reports that smartphones could "collect 'non-triggered' audio data from users' conversations near a smartphone in order to hear a 'trigger' phrase, such as 'Okay Google' or 'Hey Siri.'"