The Digital Markets Act (DMA) comes into full force in the European Union on 7 March. Article 6(4) requires Apple to permit third-party app stores to distribute apps on its iOS devices. After explaining why this requirement is important, we show that there are good reasons to believe that Apple’s proposed approach to compliance will not meet the objectives of the DMA, and most probably impede entry by rival stores as well as stifle innovation. The importance of app store choice The DMA’s require...