Apple plans to show green bubbles for RCS messages and keep iMessages blue to denote what the company considers is the most secure way for iPhone users to text
Earlier today, Apple announced its plans to bring RCS support to the iPhone in 2024. Since I published my story on the news this morning …
Context & Ripple Effects
Apple’s RCS move was framed as an upgrade from legacy cross-platform texting rather than a merger of the iMessage and Android messaging experiences. That separation became concrete when Messages later made RCS the default alternative to SMS for Android conversations in iOS 18.
The security rationale behind the color distinction has a limited shelf life: the GSMA later added interoperable cross-platform RCS encryption, and Apple subsequently began beta-testing RCS end-to-end encryption with supported carriers.
First-order effects
- Apple can add richer RCS capabilities for iPhone-to-Android conversations while preserving iMessage’s familiar visual identity and its distinct security positioning.
- iPhone users will continue to receive a clear in-app signal that an RCS thread is not an iMessage thread, even as it improves on SMS.
Second-order effects
- RCS adoption reduces the functional gap in cross-platform messaging, but the retained color split keeps Apple’s product differentiation visible at the moment users choose or evaluate a messaging service.
- As cross-platform RCS security improves, Apple’s initial contrast between blue and green becomes harder to sustain purely as a security distinction; the later beta rollout of encrypted RCS illustrates that shift.
Third-order effects
- Messaging interoperability is likely to advance first through shared transport standards while platforms retain interface-level cues that protect their proprietary network identities.
- If interoperable encryption becomes broadly deployed, competition will move away from basic messaging features and toward ecosystem integration, user experience, and network effects rather than protocol capability alone.
The trend: This is one step in the gradual standardization of cross-platform messaging, with platform owners preserving product differentiation above an increasingly common technical layer.