Apple releases the first iOS 13.4 beta, which includes a “CarKey” API, making it possible to unlock, lock, and start a car with an iPhone or Watch
Apple today released the first beta version of iOS 13.4 for developers, and now 9to5Mac has found evidences to a new feature …
Context & Ripple Effects
This beta is the first public evidence of Apple's Car Key program: a CarKey API inside iOS 13.4 that lets an iPhone or Watch lock, unlock, and start a car. It arrives mid-cycle in the iOS 13 line, following the pattern of earlier point-release betas like the unusually early iOS 13.1 beta that carried feature work between major versions.
What makes the API notable is where it leads: three years later Apple would ship an unlisted Car Key Tests app so manufacturers could validate their integrations directly, meaning today's developer beta is the seed of a formal automaker on-ramp rather than a one-off feature.
First-order effects
- Automakers gain a documented path to replace key fobs with wallet-stored digital keys, and developers can begin building lock/unlock/start flows against the API immediately in the beta.
- iPhone and Watch become the authentication surface for vehicle access, putting Apple's devices physically at the car door rather than only behind the dashboard's CarPlay screen.
Second-order effects
- Carmakers' proprietary connected-car apps now compete with a platform-level key that works without each brand building its own unlock flow, pressuring them to adopt Apple's integration or justify a parallel system.
- The later arrival of Apple's dedicated testing app shows the second-order effect hardening: manufacturers need Apple-supplied tooling to certify compatibility, shifting integration control toward Cupertino.
Third-order effects
- If the pattern holds, the phone-as-key model extends from cars to other physical-access domains, with Apple operating the credential layer and hardware makers integrating to its API — a structural role akin to what the App Store did for software distribution.
- Authentication habits compound across releases: the same Watch-centric logic later let users unlock iPhones with Face ID while masked, suggesting Apple treats the watch as a general-purpose trust token, not just a payment or key device.
The trend: Apple is turning the iPhone and Watch into a universal physical-identity layer, with CarKey as the automotive beachhead and manufacturer certification tooling marking its shift from experiment to platform.