Apple has said it would quit its default practice of retaining users audio recordings of requests made to Siri, due to user privacy concerns. They also said they would limit human review of what audio it does collect to its own employees, rather than contractors.
The changes come after Apple, earlier this month, paused a programme called Siri grading. This programme allowed humans to listen to audio recordings of users. This is to determine whether the assistant had responded appropriately to requests. For instance, whether Siri could read unread messages or upcoming calendar appointments.