Apple now supports end-to-end encrypted RCS messaging on iPhone through iOS 18.5, allowing encrypted chats with Android users for the first time. The feature arrived this week in beta form within the Messages app, blocking both Apple and Google from accessing message content in transit.
RCS, or Rich Communication Services, has long positioned itself as an SMS replacement with better features like typing indicators and high-resolution image support. However, the protocol historically lacked encryption. Apple's implementation closes that gap, using the same Signal protocol that secures iMessage conversations between iPhone users.
The move resolves a longstanding friction point between iPhone and Android users. When iPhone owners text Android contacts, messages fall back to standard SMS, which lacks encryption and displays as green bubbles on iOS. This visual distinction has become a cultural marker, with encrypted iMessage threads appearing blue. RCS encryption eliminates this gap for cross-platform conversations.
Google has pushed RCS adoption for years as a modern alternative to SMS. Apple resisted until recently, citing security concerns about the protocol itself. The company's encryption implementation suggests those concerns have shifted. The beta release indicates Apple and Google are coordinating on technical standards to make encrypted RCS work across platforms.
The feature remains in beta, meaning it may change before a full release. Users with iOS 18.5 can test it now, though widespread adoption depends on Android devices receiving corresponding updates to support encrypted RCS on Google's end.
This development could reduce reliance on third-party messaging apps for secure cross-platform communication. It also signals Apple's willingness to improve interoperability with Android, a notable shift given the company's traditional focus on ecosystem lock-in through proprietary features like iMessage.