Install on iPhone

The current Cerberus build requires iOS 17 or later and is distributed with Apple TestFlight.

Open in TestFlight

1. Install Apple's TestFlight app if prompted.
2. Open the c6s invitation link and choose Accept.
3. Install Cerberus.
4. Return to TestFlight for later beta updates.

Installing the build does not grant a c6s account. Signup still requires an active invitation, and login works only for an existing Google or Apple identity already linked to c6s.

Build lifetime

Apple TestFlight builds expire after 90 days. If the link is full, unavailable, or shows no installable build, contact support instead of using a mirror.

Current boundary

The beta app can present account entry and trusted-device experiences appropriate to its release. It must not be treated as proof that vault recovery, approval, or secret operations are enabled unless the app explicitly shows them as available.