The iPhone maker said it was moving ahead with updates to its mobile operating system to give users more information and control on tracking by apps on Apple devices.

Apple earlier this year delayed the changes to give online advertisers time to adapt.

But in a letter to the nonprofit group Ranking Digital Rights, Apple said it planned to move forward next year “because we share your concerns about users being tracked without their consent and the bundling and reselling of data by advertising networks and data brokers.”