Facebook warns iPhone apps that ad revenues will plummet due to Apple privacy changes

Facebook has warned thousands of iPhone app makers that they face a brutal downturn in advertising revenues due to forthcoming privacy changes introduced by Apple. The social media giant said around 19,000 developers that use its advertising network could see income from ads more than halve in the new version of Apple’s operating system. iOS 14, the new software due to be released for around a billion iPhones later this year, will require apps to obtain consent for using a tracking identif