Apple is making significant changes to its App Store in Europe in response to a new E.U. law. The changes, set to take effect in March, will allow users in the 27-nation bloc to access alternative app stores, use competing payment methods, and download alternative browsers. The new rules aim to loosen the control of tech giants and protect consumers. Apple's compliance with the law will impact its App Store sales, as it will reduce fees for developers and open the door to alternative distribution channels. However, Apple has expressed concerns about potential security threats and fraud that could arise from these changes. The company has also introduced a notarization process to maintain some control over the apps distributed across iPhones.