Apple updated the App Store review guidelines, added iOS application rules for handling NFTs, and allowed in-app NFT minting, purchase and sales services, "Apps may allow users to view their own NFTs, provided that NFT ownership does not unlock the in-app feature or functionality; an app may allow users to browse collections of NFTs owned by others, provided the app does not include buttons, external links, or other calls to action that lead users to purchase in-app purchase mechanisms". In addition, the rules related to encrypted transactions have been revised, "Apps may facilitate the transaction or transmission of cryptocurrencies on approved exchanges, provided that they are only available in countries or regions where the application has the appropriate licenses and permissions to provide cryptocurrency exchange transactions. ".