Since the launch of iOS 9 there have been a number of new Ad Blocking apps in the app store, the most prominent one was pulled by its developer, Marco Arment after a few days.
Now Apple has removed some of these Ad Blocking apps from their app store, some of these apps were installing root certificates and then monitoring peoples data.
Apple released an official statement about the apps that it has removed, not all of them were Ad Blocking apps, there were some other apps as well.
Apple is deeply committed to protecting customer privacy and security. We’ve removed a few apps from the App Store that install root certificates which enable the monitoring of customer network data that can in turn be used to compromise SSL/TLS security solutions. We are working closely with these developers to quickly get their apps back on the App Store, while ensuring customer privacy and security is not at risk.
Some of the apps that have been removed, plan to make changes to their code and resubmit them to Apple, whether they will be approved again, remains to be seen.