In London's Competition Appeal Tribunal, a $2.7 billion lawsuit filed by app developers against Apple asks an enduring question about power: when a gatekeeper writes the rules, who ensures those rules apply equally to all who must pass through the gate? Apple's 2021 App Tracking Transparency feature, presented to the world as a privacy shield for users, is now accused of functioning as a competitive moat — one that constrained third-party developers while leaving Apple's own advertising business free to move. The case, led by former UK competition official Ann Pope, may ultimately determine wh