title: Can your iOS app use speech/voice recognition even when the app isn't running and the iPhone is locked?
body: <p>The app would be using Speech API and not SiriKit since Siri requires "Hey Siri" to be activated before it can take any input. 
  I want my app to be always listening and call a function when the user says a certain word. Is it possible to have this feature in the app? </p>