Spain's National Markets and Competition Commission (CNMC) has launched an investigation into Apple's App Store practices, citing potential anti-competitive behavior and unfair trading conditions imposed on developers. The probe could lead to fines up to 10% of Apple's global revenue if violations are confirmed. This investigation follows similar actions by regulators in the European Union and the United Kingdom. Apple denies any wrongdoing, claiming it maintains a level playing field for developers and adheres to clear and consistent rules. The investigation is expected to take up to two years. Apple has expressed its intention to cooperate with the CNMC to address their concerns.