Systems and methods for pet insurance enrollment, adjustment, and utilization are provided herein. In some embodiments, one or more pet insurance offerings and a pet insurance enrollment process are available to a user through a mobile application on a mobile computing device. In some embodiments, a preliminary premium rate is calculated based on background information provided by a user through the mobile application. In some embodiments, a pet tracker forms a portion of the system, and an adjusted premium rate can be calculated based on pet monitoring data received directly or indirectly from the pet tracker. In some embodiments, pet monitoring data acquired from a plurality of pet trackers are used to develop, inform, and refine one or more pet insurance actuarial models.