• Recent changes by Apple to improve privacy for users of iOS may be affecting tools used by Facebook to help advertisers measure the effectiveness of their ad campaigns, The Wall Street Journal reports. In a blog post, Facebook Vice President of Product Marketing Graham Mudd suggested Facebook may be "underreporting iOS web conversions by approximately 15%." He also said Facebook is "optimistic about our multi-year effort to develop new privacy-enhancing technologies" that will help minimize the amount of personal data that's collected while still allowing for personalized ads. 
• The Washington Post reports its investigation with researchers at software maker Lockdown found some iPhone applications continued tracking users even after being asked not to track. Apple released its App Tracking Transparency framework this spring, but privacy advocates say some apps are using fingerprinting to continue gathering user data. The investigation found at least three games continued sharing identifying information with advertising companies after being asked not to track.

Editor’s note: IAPP Staff Writer Joe Duball reported details on Apple’s framework.