The European Union's antitrust regulators are closely examining Apple's newly revised fee structure for app developers. At the center of this review lies the "core technology fee" of €0.50 per app installation imposed on developers by Apple. The European Commission has dispatched questionnaires intended to gauge whether this new fee structure will escalate costs for software manufacturers. The assessment will delve into whether these additional costs will be passed on to consumers, whether developers will be compelled to alter their business models, and whether Apple's assertions about the new system reducing costs for developers hold true. Apple has previously been the subject of numerous antitrust investigations and lawsuits concerning its App Store fee model. While this adjustment aims to align with the EU's Digital Markets Act, it continues to encounter regulatory hurdles.