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Apple Faces £2 Billion Legal Action on behalf of Thousands of UK App Developers Over App Tracking Transparency (ATT) Framework

London, 3 September 2026 – Apple faces a £2 billion collective action, filed on behalf of thousands of UK app developers in the UK Competition Appeal Tribunal (CAT) by ATT Collective Action Limited whose director Ann Pope is the former Senior Director for Antitrust at the CMA. The claimants argue that Apple's App Tracking Transparency (ATT) framework was designed and implemented unfairly and without proper consultation, imposing stricter requirements on third-party app developers than on its own services and leaving UK app developers unable to adapt their business models in time to avoid significant losses.

Read full press release here

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You could be owed compensation

If you or your organisation are a UK-based iOS app developer, and have generated revenue from advertising within a third-party iOS app and/or incurred expenditure on advertising to acquire users for a third-party iOS app between 26 April 2021 and 3 September 2026, you could be entitled to compensation.