Abstract: The present disclosure provides a device for measuring a stability of an implant system. The device includes a housing configured to be positioned adjacent the implant system. The device also includes an actuator coupled to the housing. The actuator is configured to vibrate the implant system when actuated. The device also includes a motion sensor coupled to the housing, and a controller in communication with the motion sensor and the actuator. The controller includes at least one processor, and data storage including program instructions stored thereon that when executed by the at least one processor, cause the controller to perform functions including: (i) receiving motion data from the motion sensor when the actuator is actuated, and (ii) determining an angular stiffness of the implant system based on the motion data.