Abstract: Wireless keyless entry systems for automotive vehicles that employ activity, fitness, biometric, and/or proximity data for identifying authorized system users and/or personalizing, tailoring, or controlling operational aspects of the automotive vehicles. The wireless keyless entry systems are configured to be worn by system users as wearable key fobs, allowing the wireless keyless entry systems to detect motions of the system users, monitor biometric data from the system users, as well as determine proximities of the system users relative to the respective automotive vehicles. By employing such activity, fitness, biometric, and/or proximity data for authorized system user identification and/or automotive vehicle operational control, the disclosed wireless keyless entry systems can enhance the security, safety, and convenience of automotive vehicle operators.