Twitter Now Tracks Other Apps You've Installed

New York: Twitter says it is now tracking what other apps its users have installed on their mobile devices so it can target content and ads to them better.

Twitter Inc. said on Wednesday that users will receive a notification when the setting is turned on, and can opt out using settings on their phones. On iPhones, this setting is called "limit ad tracking." On Android phones, it's "opt out of interest-based ads."

Twitter says it is only collecting the list of apps that users have installed, not any data within the apps.

It won't collect the app lists from people who have previously turned off ad targeting on their phone.