Apple is facing a new antitrust investigation by Spain’s competition authority, CNMC, over concerns that it may be imposing unfair trading conditions on developers using its App Store. This probe, which could take up to two years, might result in a penalty of up to 10% of Apple's global annual turnover if a breach is confirmed. Developer complaints about Apple's App Store practices, including high fees and arbitrary decision-making, have been ongoing. Apple defends its policies, claiming they ensure a safe and high-quality user experience. This investigation adds to Apple's growing regulatory challenges in Europe, including a recent €1.84 billion fine and ongoing probes by the European Commission under the Digital Markets Act. The UK is also preparing its own competition reforms targeting Big Tech.