Apple is facing a £2bn collective action in London over its App Tracking Transparency rules, with app developers alleging that the privacy framework unfairly restricts third parties while benefiting Apple’s own advertising ecosystem.
The claim has been filed at the Competition Appeal Tribunal on behalf of developers that say they suffered financial losses because Apple imposed more restrictive tracking requirements on outside applications than on its own services.
Apple introduced App Tracking Transparency in 2021. The feature requires applications to obtain permission before tracking a user’s activity across other companies’ apps and websites, giving iPhone and iPad users a direct choice over whether tracking is allowed.
The company has consistently presented the system as a privacy safeguard. Developers and advertising businesses have nevertheless challenged its commercial effects, arguing that restricting access to third-party tracking data can alter competition in digital advertising and app monetisation.
The UK action is being led by Ann Pope, a former senior official at the Competition and Markets Authority. She said Apple’s policy had caused “very significant harm to businesses that depend on Apple as a gatekeeper”.
Apple disputes the allegations and says it is “bound by the exact same requirements as all developers”.
The case adds to a growing body of European scrutiny surrounding the way dominant mobile platforms set rules for businesses that depend on their operating systems, app stores, advertising tools, and user data.
Competition authorities have increasingly focused on whether platform operators can impose requirements on third parties while simultaneously competing with those businesses in adjacent markets. The question is particularly sensitive in digital advertising, where access to behavioural information can influence the effectiveness of targeted campaigns and the revenue generated by ad-supported apps.
Apple’s privacy changes created a major shift because iOS developers can no longer assume users will consent to cross-app tracking. Companies reliant on targeted advertising have had to adjust attribution models, customer-acquisition strategies, and the way they measure returns from digital marketing expenditure.
The legal question is separate from whether stronger privacy controls benefit users. The claim centres on the competitive design of the rules and whether Apple applied them in a way that abused its market power. Those allegations have not been determined by the tribunal.
The proceedings also sit within a wider European regulatory context. Apple’s App Tracking Transparency framework has been examined by authorities in Germany, France, Italy, and Poland. Germany’s competition authority previously raised concerns over differences between requirements applied to Apple and those imposed on third parties, and Apple agreed changes there during August.
Digital-platform regulation has increasingly moved beyond app-store commissions into the broader rules governing how developers reach users, process payments, collect data, and advertise. Those policies can materially alter both revenue and customer-acquisition costs even when the underlying software product does not change.
The £2bn attached to the UK action represents damages alleged on behalf of affected developers rather than an established liability. Collective proceedings must pass through the tribunal process, and Apple will have the opportunity to contest the substance of the claim.
The litigation therefore opens another front in the dispute over the degree of control large technology platforms can exercise over the commercial environment surrounding their devices. Privacy remains central to Apple’s product proposition, while regulators and litigants are separately examining whether rules presented on privacy grounds produce anti-competitive effects.
No finding has been made that Apple breached competition law. The progress of the claim will determine whether the allegations proceed to a substantive assessment of the tracking framework and the financial losses developers say followed from it.
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